1 فَسَدَ ذ , aor. فَسُدَ , (S, M, A, O, L, Msb, K, &c.,) which is the aor. commonly known, (TA,) and فَسِدَ , (IDrd, M, O, L, K,) which is of weak authority; (IDrd, O, TA;) and فَسُدَ , aor. فَسُدَ ; (S, M, O, L, K;) inf. n. فَسَادٌ (S. M, A, O, L, K) and فُسُودٌ , (M, O, L, K,) the former being inf. n. of فَسَدَ , aor. فَسُدَ , (S, A, O,) and so the latter, and the former being also inf. n. of فَسُدَ , (O,) or the former is of فَسُدَ and the latter is of فَسَدَ , (TA,) or the former is a simple subst., and the latter is the inf. n.; (Msb;) It (a thing, S, A, O) [and he (a man)] was, or became, bad, evil, corrupt, unsound, wrong, wrongful, improper, unrighteous, wicked, vitious, depraved, or dishonest; devoid of virtue, or efficacy; in a corrupted, vitiated, perverted, marred, spoiled, injured, impaired, deteriorated, tainted, or infected, state; in a state of disorder or disturbance, destruction, annihilation, consumption, waste, or ruin; (MA, KL, PS, &c.;) and so : (KL:) contr. of صَلَحَ : (M, * L, K:) it became altered in its state [ for the worse ]: and it became null, void, of no force, or of no account; or it came to nought, or perished; accord. to the explanation by most of the expositors of the ex. in the Kur xxi. 22. (MF.)

2 فَسَّدَ see 4, first sentence.

3 فاسدهُ ذ He became at variance with him; he cut, severed, or broke, the tie of friendship [or kindred ] with him. (L in art. كشح .) And فُلَانٌ يُفَاسِدُ رَهْطَهُ [ Such a one cuts the ties of friendship, or kindred, with his people, tribe, or near kinsfolk ]. (A.)

4 افسد ذ , (S, M, O, L, Msb, K, &c.,) inf. n. إفْسَادٌ and [quasi-inf.n.] فَسَادٌ ; (L;) and , (O, L, Msb, K,) inf. n. تَفْسِيدٌ ; (O, K;) He, or it, made, or rendered, bad, evil, corrupt, unsound, wrong, wrongful, improper, unrighteous, wicked, vitious, depraved, or dishonest; deprived of virtue, or efficacy; corrupted, vitiated, perverted, marred, spoiled, injured, impaired, deteriorated, tainted, or infected; [ constituted, disposed, arranged, or qualified, ill, wrongly, or improperly; ] disordered, or disturbed, [ disorganized, ] destroyed, annihilated, consumed, wasted, or ruined; (MA, KL, &c.;) contr. of أصْلَحَ . (M, L, K.) One says, افسد المَالَ [ He rendered the property in a bad state; marred, impaired, consumed, or wasted, it ]. (L.) [And افسد عَلَيْهِمْ He corrupted, perverted, or marred, their state, case, affair, scheme, plot, or the like; أَمْرَهُمْ , or the like, being understood. And افسدهُ عَلَىَّ He corrupted him and rendered him disaffected towards me. ] إِفْسَادُ صَبِىٍّ , occurring in a trad., means The injuring a child by rendering its mother pregnant while she is suckling it and so vitiating her milk: which act is also termed الغِيلَهُ . (L.) [And افسد as contr. of أَصْلَحَ signifies also He acted in a bad, an evil, or a corrupt, manner; acted ill, corruptly, wrongly, wrongfully, improperly, unrighteously, wickedly, vitiously, or dishonestly; or did evil, or mischief; إِلَيْهِ to him: and he created, or excited, disorder, disturbance, disagreement, discord, dissension, strife, or quarrel-ling; or made, or did, mischief; بَيْنَ القَوْمِ between, or among, the people, or party. (See also 10.)]

6 تفاسدوا ذ They became at variance, one with another; (M, L;) they cut, severed, or broke, the tie of kindred, (M, L, K,) and of friendship, (L,) one with another. (M, L, K.)