courageous, martial, dignified
僩 centers on a person of strong, dignified bearing: someone courageous, martial in spirit, and commanding respect through their presence.
僩 combines 亻 (person) with 閒, which likely contributes the sound and may suggest a person of leisure or refined bearing, though the exact semantic link is uncertain.
A person 亻 beside 閒, which visually contains 門 (gate) and 月 (moon). Imagine a dignified warrior standing calmly under the moon at the gate, radiating courage and martial poise.
For カン, picture a courageous person who can stand alone at the gate under the moon: can -> カン, and their dignified bearing shows they can handle anything.