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1.
He sought, desired, demanded, or begged, of him, aid, help, or assistance. (MA.) You say, اِسْتَعَنْتُهُ, (Mgh,) or اِسْتَعَنْتُ بِهِ, (S, Msb,) or both, (K,) فَأَعَانَنِى (S, Mgh, Msb, * K) and عَاوَنَنِى, (S, TA,) for which last, عَوَّنَنِى is erroneously put in the copies of the K; (TA;) [i. e. I sought, &c., of him, aid, &c., and he aided me.] The alteration of the infirm letter [و into ا] is made in استعان and اعان in imitation of a general rule [which requires it when that alteration is made in the unaugmented triliteral verb], though عَانَ, aorist يَعُونُ, [as their source of derivation,] is not used. (TA.) ب [i. e. بِ] is called حَرْفُ اسْتِعَانَةٍ [A particle denotative of seeking aid, &c.,] because when you say ضَرَبْتُ بِالسَّيْفِ and كَتَبْتُ بِالقَلَمِ and بَرَيْتُ بِالمُدْيَةِ, it is as though you said اِسْتَعَنْتُ بِهٰذِهِ الأَدَوَاتِ عَلَي هٰذِهِ الأَفْعَالِ [meaning I sought aid of these instruments, or made use of them as means, against, i. e. to perform, these actions of smiting &c.]. (TA.) [And you say, استعان بِنَفْسِهِ, meaning He sought self-help, or exerted himself, فِي أَمْرٍ in an affair, and عَلَيْهِ against it, or him.]
2.
استعان signifies also He shaved his عَانَة, or pubes; (S, Msb, K;) and so تَعَيَّنَ, originally تَعَوَّنَ, on the authority of ISd. (TA.)

Perseus ID: n31106