聞く
きく · kiku · JLPT N5 · verb-godan
to listen
👂 聞 = gate 門 + ear 耳: an ear at the gate hears, then asks
The kanji puts an ear 耳 inside a gate 門: someone listening at the door. Hearing leads to asking, so kiku covers both. Sound hook: kiku is like a quick 'key-coo' — the key to learning is to listen and ask.