脇
わき · waki · JLPT N3 · noun
side
💪 waki sounds like walkie: a walkie-talkie clipped at your side
脇 = 月 (the flesh/body radical) + 劦 (three 力, strength). It is the strong body part at your side, the armpit area under the arm. That is why 脇 also means flank, and 脇道 (wakimichi) is a side road.