From 釣(つ)り (tsuri, “fishing, 連(れん)用(よう)形(けい) (ren'yōkei, “stem or continuative form”) of the verb 釣(つ)る (tsuru, “to fish”).”) + 具(ぐ) (gu).
つりぐ • (tsurigu) ←つりぐ (turigu)?