嘂

Its parts

• 吕 lǚ pitchpipe, pitch standard, one of the… = 口 + 口
• 丩 jiū old variant of 糾|纠[jiu1] = + 丨 sound
• 吕 lǚ pitchpipe, pitch standard, one of the… = 口 + 口

Other characters with 丩 as their sound:

叫 jiào收 shōu纠 jiū赳 jiū

Dictionaries file it under 口.