maṣdarسَهْوٌmuḍāriʿيَسْهُو
Core sense — he was unmindful, forgetful, or neglectful of it; he forgot itgenerated
1.1he was unmindful, forgetful, neglectful, or heedless of a thing—فِيهِ
maṣdar سَهْوٌ and سُهُوٌّ.
Synonymous with غَفَلَ عَنْهُ. Or: he forgot it, or neglected it, and became unmindful of it, his mind turning to some other thing or affair; so explained in the M and T, which makes السَّهْوُ and الغَفْلَةُ and النِّسْيَانُ one in meaning.
According to Esh-Shiháb, السَّهْوُ is a slight غَفْلَة [or unmindfulness] of what is still within reach of the memory, as when a person's attention is roused by the least reminder, whereas النسيان means that it has passed out of the memory entirely; though all are used in one sense, relying carelessly on the reader's or hearer's understanding.
In the Msb a distinction is made between السَّاهِى and النَّاسِى: the latter is used of one who remembers when he is reminded, the former of one who does not.
According to IAth, سَهَافِى الشَّىْءِ means he neglected or omitted the thing unknowingly, and سَهَا عَنْهُ he neglected or omitted it knowingly. Or, as some say, السَّهْوُ is doing wrong out of unmindfulness, as when an insane person reviles another, which is pardonable, or when a man drinks wine and then some unpleasing action comes from him unintentionally, which is punishable.
he was unmindful in prayer—سَهَافِى الصَّلَاةِ
he was unmindful of prayer—عَنْهَا
Both are the same as غَفَلَ.
1.1.1she conceived during menstruation—حَمَلَتْ سَهْوًا
Said of a woman.
his mother conceived him during menstruation—حَمَلَتْ بِهِ أُمُّهُ سَهْوًا
on this sense This seems to come from the sense above, as implying an unexpected event.
1.1.2being still, or quiet, and gentle—السَّهْوُ
It also has the meaning of السُّكُونُ and اللِّينُ.
[Apparently as a maṣdar; though the S adds immediately that the plural is سِهَآءٌ, it seems that an early transcriber of the S omitted to insert after اللَّينُ the words وَالسَّاكِنُ وَاللَّيِّنُ: see سَهْوٌ below.]
he did it voluntarily, without being asked and without constraint—فَعَلَهُ سَهْوًا رَهْوًا
Or: quietly and calmly, without being hard or difficult.
he looked at him, or it, with motionless eye—سَهَا إِلَيْهِ
the eye ranges freely over it—العَيْنُ تَسْهُو فِيهِ
Synonymous with تَنْبَسِطُ.
1.2being easy to ride, as a quality of a camel—سَهَاوَةٌ
A maṣdar, of which the verb is سَهُوَ.
1.3[cattle] of which the end is not to be reached—مَالٌ لَا يُسْهَى وَلَا يُنْهَى
[there return in the evening to the sons of such a one, of cattle,] what cannot be numbered for multitude—يَرَاحُ عَلَى بَنِى فُلَانٍ مِنَ المَالِ مَا لَا يُسْهَىوَلَا يُنْهَى
Temeem went away, and will not be remembered, or will not be mentioned—ذَهَبَتْ تَمِيمُ فَلَا تُسْهَى وَلَا تُنْهَى
Or: what cannot be computed, or reckoned by conjecture.
That is, لَا تُذْكَرُ; a saying of El-Ahmar.
Show Lane's original text
, (S, Msb,) or فِيهِ , (K,) aor. يَسْهُو , inf. n. سَهْوٌ (S, Msb, K) and سُهُوٌّ , (M, K,) He was, or became, unmindful, forgetful, neglectful, or heedless, of it, or inadvertent to it; (S, Msb;) namely, a thing; syn. غَفَلَ عَنْهُ : (S, * Msb:) or he forgot it, or neglected it, ( نَسِيَهُ ,) and was, or became, unmindful, forgetful, &c., of it, or inadvertent to it, ( غَفَلَ عَنْهُ ,) his mind adverting to another thing or affair or case; (K, TA;) thus expl. in the M and T; so that السَّهْوُ and الغَفْلَةُ and النِّسْيَانُ are made to be one [in signification]; (TA;) but accord. to Esh-Shiháb, السَّهْوُ is a slight غَفْلَة [or unmindfulness &c.] of that which is within the scope of the retentive faculty, such as when one's attention is roused by the least rousing thereof; whereas النسيان denotes its passing away from the memory entirely; though all are used in one sense by a careless reliance upon the understanding of the reader or hearer: in the Msb it is said that a distinction is made between السَّاهِى and النَّاسِى by the latter's being applied to him who, when he is reminded, remembers, and the former's being applied to him who is in the contrary case: accord. to IAth, سَهَافِى الشَّىْءِ means he neglected, or omitted, the thing unknowingly; and سَهَا عَنْهُ , he neglected, or omitted, it knowingly: or, as some say, السَّهْوُ is the doing wrong from unmindfulness ( عَنْ غَفْلَة ); as when an insane person reviles another, which is pardonable; and as when one drinks wine and then some unpleasing action proceeds from him unintentionally, which is punishable. (TA.) One says, سَهَافِى الصَّلَاةِ , and عَنْهَا , i. q. غَفَلَ [He was, or became, unmindful in prayer, and of it]. (TA.) [Hence, app., as implying an unexpected event,] حَمَلَتْ سَهْوًا She (a woman, S) conceived in menstruis. (Az, S, Z, K.) And حَمَلَتْ بِهِ أُمُّهُ سَهْوًا His mother conceived him in menstruis. (JK.) السَّهْوُ also signifies السُّكُونُ (JK, S, K) and اللِّينُ (JK, S,) [app. as an inf. n., i. e. as meaning The being still, or quiet, and gentle; though it is immediately added in the S that the pl. is سِهَآءٌ ; for it seems that an early transcriber of the S has omitted to insert after اللَّينُ the words وَالسَّاكِنُ وَاللَّيِّنُ : see سَهْوٌ below]. One says, فَعَلَهُ سَهْوًا رَهْوًا He did it voluntarily, without its being asked, or demanded; (K, TA;) and without constraint: (TA:) or quietly, or calmly, without being hard, or difficult. (TA in art. رهو .) And سَهَا إِلَيْهِ He looked at him, or it, with motionless eye. (Msb, TA.) And العَيْنُ تَسْهُو فِيهِ The eye expatiates in it; syn. تَنْبَسِطُ . (JK.) سَهَاوَةٌ , as denoting a quality of a camel, The being easy to ride; (K;) an inf. n., of which the verb is سَهُوَ . (TA.) مَالٌ لَا يُسْهَى وَلَا يُنْهَى [Cattle] of which the end is not to be reached. (AA, JK, S, K.) You say, يَرَاحُ عَلَى بَنِى فُلَانٍ مِنَ المَالِ مَا لَا يُسْهَىوَلَا يُنْهَى [There returns from the place of pasture in the evening, or afternoon, to the sons of such a one, of cattle,] what is not to be numbered for multitude: (T, TA:) or what is not to be computed, or computed by conjecture. (IAar, TA.) And ذَهَبَتْ تَمِيمُ فَلَا تُسْهَى وَلَا تُنْهَى , meaning لَا تُذْكَرُ [i. e. Temeem went away, and will not be remembered, or will not be mentioned]: a saying of El-Ahmar. (TA.)