, (Ḳ,) [or perhaps فَهَّ, but originally فَهِهَ], like فَرِحَ, (Ḳ,) sec. pers. فَهِهْتَ, [aor. فَهَ3َ,] inf. n. فَهَهٌ (Ṣ, TA) [and app. فَهَّةٌ and فَهَاهَةٌ], He (a man, Ṣ) lacked power or ability. (Ṣ, Ḳ.) And فَهَّ, inf. n. 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.)―
And فَهِهْتُ الشَّىْءَ I forgot the thing. (ISh, Ḳ, * TA. [In the Ḳ 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, inf. n. فَهٌّ [probably, I think, a mistake for فَهَّةٌ], He forgot the thing. (TA.) See also 4.