عصى1 عَصَاهُ, aor. ـْ inf. n. عَصْىٌ and مَعْصِيَةٌ (S, Msb, K, TA) and عِصْيَانٌ, (TA, and so in some copies of the S,) or this last is a simple subst., (Msb,) He ([for instance] a slave, Msb, TA) disobeyed him, or rebelled against him, (S, K, TA,) i. e., his master; (Msb, TA;) as also ↓ عاصاهُ, (S, Msb, K, TA,) inf. n. مُعَاصَاةٌ; (TA;) and عَلَيْهِ ↓ استعصى, (S,) meaning he opposed him, or resisted him, and did not obey him, [or he rebelled against him,] namely, his prince, or commander. (TA.) [See also an ex. of the first in a verse cited voce زُجٌّ] فُلَانٌ يَعْصِى الرِيحَ means (assumed tropical:)  Such a one faces the quarter from which the wind blows, not opposing his side to the wind. (TA.) 3 عَاْصَىَ see the preceding paragraph.5 تعصّىِ It (an affair) was, or became, difficult; syn. اِعْتَاصَ: (K, TA:) said by some to be originally تَعَصَّصَ; like تَظَنَّى and تَقَضَّى. (TA.) 6 تعاصى [occurs in the S and TA, voce تَحَمَّسَ, as meaning He feigned disobedience, or rebellion: and in the A and TA, voce تَشَاغَبَ, as meaning he manifested incompliance].8 اِعْتَصَتِ النَّوَاةُ The date-stone was, or became, hard. (S, K.) 10 إِسْتَعْصَىَ see the first paragraph.عِصْيَانٌ [mentioned above as an inf. n., but accord. to the Msb a simple subst.,] Disobedience, or rebellion; contr. of طَاعَةٌ. (S, K.) عَصِىٌّ: see what follows, in two places.عَاصٍ and ↓ عَصِىٌّ Disobeying, or rebelling; or disobedient, or rebellious: (S, K:) [both are mentioned in the S and K as though syn.: but] ↓ the latter is an intensive epithet [and therefore has the latter signification, or means very disobedient or rebellious]: the pl. of the former is عُصَاةٌ. (Msb.) b2:  العَاصِى is an appellation of The young camel when it disobeys its mother, and does not follow her. (TA.) b3:  And it signifies also (tropical:)  The vein that will not cease bleeding: (S, K, TA:) belonging to this art. and to art. عصو: (TA: mentioned in art. عصو in the K:) pl. العَوَاصِى. (S.)