فسأ1 فَسَأَهُ: see 2. b2:  Also, (M, K,) or فَسَأَهُ بِالعَصَا, (Az, O,) aor. ـَ inf. n. فَسْءٌ, (M,) He struck, or beat, (Az, M, O, K,) him, (O,) or his back, (Az, M, K,) with the staff, or stick; (Az, M, O, K;) as also ↓ تفسّأهُ, (K,) or تفسّأهُ بالعصا. (O.) b3:  and فَسَأَ فُلَانًا عَنْهُ He restrained, withheld, or debarred, such a one from him. (O, * K.) A2:  فَسِئَ, aor. ـَ [inf. n., app., فَسَأٌ, q. v. infrà,] He was, or became, such as is termed أَفْسَأُ [q. v.]. (K.) 2 فسّأهُ, namely, a garment, or piece of cloth, (S, M, O, K,) inf. n. تَفْسِئَةٌ (S, O) and تَفْسِىْءٌ, (S,) He stretched it so that it rent, or became ragged, or dissundered: (S, O:) or he rent it; as also ↓ فَسَأَهُ, aor. ـَ (M, K,) inf. n. فَسْءٌ (M.) 5 تفسّأ, said of a garment, or piece of cloth, (S, M, O, K,) It became ragged, or dissundered, (S, O,) and worn out: (S:) like تقضّأ, or تفصّأ: (accord. to different copies of the S: the latter in the L:) or it became rent. (M, O.) b2:  تفسّأ فِيهِمْ, (K,) or بِهِمْ, (O,) said of a disease, It spread among them, (O, K,) and became common among them: (TA:) like تفشّأ. (O, K.) A2:  تفسّأ: see 1.6 تفاسأ, and تفاسى, (M, O, TA,) He (a man) protruded (M, O, TA) his posteriors, (M,) or his back, (O,) or both. (TA.) فَسَأٌ a subst. signifying The state of such as is termed أَفْسَأُ [q. v.]: (M, TA:) or a hollowness, or incurvity, of the spine. (TA in art. فقأ.) [See also 1, last sentence.]أَفْسَأُ i. q. أَبْزَخُ [i. e. Having a protuberant breast, or chest, and hollow back; &c.]: or having a protuberant breast, or chest, and the lower part of the belly prominent: (M, K:) fem. فَسَآءُ: (M:) and (M, in the K “ or ”) he who, when he walks, is as though his posteriors were in pain (in the M تَوْجَعُ; in some copies of the K تَوَجَّعُ [as though for تَتَوَجَّعُ], and in some يرجع); as also ↓ مَفْسُوْءٌ: (M, K:) or he who, when he sits, cannot rise but with an effort: (O, K:) or whose spine enters into [or turns inwards between] his haunches. (K.) مَفْسُوْءٌ: see the next preceding paragraph.