فَهِهَ
1.
, (K,) [or perhaps فَهَّ, but originally فَهِهَ], like فَرِحَ, (K,) sec. pers. فَهِهْتَ, [aorist
فَهَ3َ
,] verbal noun فَهَهٌ (S, TA) [and apparently فَهَّةٌ and فَهَاهَةٌ], He (a man, S) lacked power or ability. (S, K.) And فَهَّ, verbal noun فَهَاهَةٌ and فَهَّةٌ, He made a slip, or committed a fault, from lack of power or ability, &c. (TA.) And فَهَّ فِى خُطْبَتِهِ, and حُجَّتِهِ, He (a man) failed of being thoroughly effective [in his discourse, or oration, or harangue, and his argument, or plea, or evidence]. (TA.)
2.
And فَهِهْتُ الشَّىْءَ
I forgot the thing. (ISh, K, * TA. [In the K the third pers. is mentioned, as being فَهِهَ; but I think it should be contracted (agreeably with a general rule), as in what here follows.]) And فَهَّ عَنِ
الشَّىْءِ, verbal noun فَهٌّ [probably, I think, a mistake for فَهَّةٌ], He forgot the thing. (TA.) See also 4.