بسن4 ابسن, said of a man, He was, or became good, or beautiful, in respect of his سَجِيَّة [i. e. natural disposition], accord. to the copies of the K, but correctly, as explained by IAar, his سَحْنَة [i. e. aspect, or colour, &c.]. (TA.) بَسَنٌ an imitative sequent to حَسَنٌ: (S, M, K:) [or it may signify Beautiful in aspect &c., from the verb above; or the verb may be from this word:] or, in the opinion of Aboo-'Alee El-Kálee, originally بَسٌّ inf. n., used in the sense of the pass. part. n., of بَسَّ السَّوِيقَ, meaning “he moistened, or stirred about, the سويق with clarified butter, or with olive-oil, to complete, or perfect, its goodness; ” one of the two س s being suppressed, and ن being added; so that it means complete, or perfect. (MF. [But this derivation seems to be extremely far-fetched.])