From 練(ね)り (neri, 連(れん)用(よう)形(けい) (ren'yōkei, “stem or continuative form”) of the verb 練(ね)る (neru).) and 天(てん)ぷら (tenpura, “tempura”).
ねりてん • (neriten) ←ねりてん (neriten)?