佥 (simplified from 僉) meant 'all / in unison' in classical Chinese and is not used alone today. It lives on as the phonetic in 签 (to sign), 检 (to inspect), 脸 (face), 剑 (sword), and 验 (to test).
Components
ideograph
佥qiān
all; in unison
Treated as one unit in the simplified form. The fuller traditional 僉 stacked a 'gather' top over two 'mouth' and two 'person' elements to picture a crowd speaking together; the simplified shape no longer maps to those parts.
Filed under radical 人 (rén, #9) by convention. 人 is not a separate component in 佥, so no strokes are highlighted.