What is the meaning of あご?

顎, 腭, 頤: a chin; a lower jaw; a meal; chit-chat, talk; alternate for 鮟鱇 (ankō, “anglerfish”)

腮: a gill; alternate for 鐖 (agu, “the barb on a hook”)

顋: a lower jaw; a gill

距: alternate for 距 (agoe, “the spur claw on animals such as chickens”)

吾子: term of endearment for one's own child; you (compare English sweetie, dearie, love); I, me

網子: a netter: someone who helps haul in a fishing net

齶: a jaw

諤: talk; speaking the truth

頷: nod

飛魚: a flying fish

阿児: the town of Ago in Mie Prefecture, Japan

英虞: short for 英虞湾 (​Agowan): Ago bay

Source: wiktionary.org