ذَهِنٌ
and
ذِهْنٌ
Intelligent, possessed of understanding, sagacious, acute, skilful, or knowing, [and endowed with a retentive mind;] each [said to be] a possessive epithet, [signifying possessing
ذِهْن, though the former is agreeable with a general rule as particle n. of ذَهِنَ,] applied to a man; the latter apparently changed [or contracted] from the former. (TA.)