They have deep feelings and are inseparably attached.
Tips
usage
绸缪 is mostly seen inside the chengyu 未雨绸缪 (wèi yǔ chóu móu, 'tie up the thatch before the rain' — to prepare for trouble before it comes). On its own it is highly literary.
history
From 《诗经·豳风·鸱鸮》: 迨天之未阴雨，彻彼桑土，绸缪牖户 — 'before the sky darkens with rain, gather mulberry roots and bind up the windows and doors.'
