效 xiào effect; efficacy; to imitate
Made up of [交 jiāo to hand over; to deliver; to turn over , 攵 suī rap radical 66]Made with 10 strokes.
Jiao - the left part provides the rough phonetic, the 'rap' part suggests an action
Related characters
Also uses 交 jiāo component: 较 jiào (comparatively) 饺 jiǎo (dumpling) ; 郊 jiāo (suburbs) ; 胶 jiāo (to glue) ; 校 xiào (school) ; 咬 yǎo (to bite)
Also uses 攵 suī component: 放 fàng (let go) 故 gù (happening) ; 徽 huī (emblem) ; 教 jiào (religion) ; 教 jiāo (to teach) ; 散 sàn (to scatter) ; 攸 yōu (distant) ; 致 zhì (to send)