• 翼つばさ — wing
• 主翼しゅよく — main wing (of an aircraft)
• 右翼うよく — right wing / right faction / right side
• 左翼さよく — left wing / left faction / left side
• 翼よく下か — “under someone’s wing,” under one’s protection
• 翼よく賛さん — support group / allied wing

The bottom of 翼 is the “feather / wing” radical 羽. The upper parts add sound (ヨク) and suggest structure. Together, 翼 is literally “wings,” like on a bird or plane — and by extension, a “wing” or side of a group.