second verse in a linked poem
Technical term in renga (linked verse) and related forms; specifically the verse that follows the opening hokku.
連歌では、発句の後に脇句が続く。
In renga, the wakiku follows the hokku.
From 脇 (waki, 'side, supporting') + 句 (ku, 'phrase, verse'), referring to the verse that stands beside the opening verse.