noun, na-adjective
having both knowledge and virtue
Describes a person who is both learned and morally excellent; a somewhat formal, literary expression.
彼は知徳円満な人物として尊敬されている。
He is respected as a person of both knowledge and virtue.
A yojijukugo (four-character idiom) combining 知 (knowledge), 徳 (virtue), 円 (round, perfect), and 満 (full, satisfied), literally meaning 'knowledge and virtue are perfectly complete'.