knuckle under (to (someone/something))

to accept unwillingly what someone or something demands.

We want to reach an agreement, but we won't knuckle under to their demands.

Related vocabulary: give in to someone/something

• be coming apart at the seams
• be comme il faut
• be compos mentis
• be conspicuous by absence
• be conspicuous by your absence
• be cooked to a turn
• be cooking on gas
• be cup of tea
• be cut from the same cloth
• be cut to the bone
• be damned
• be damned if do and damned if don't
• be damned if do and damned if you don't
• be damned if you do and damned if don't
• be damned if you do and damned if you don't
• be dead and buried
• be dead from the neck up
• be dead from the waist down
• be dead in the water
• be dead meat
• be dead on feet
• be dead on your feet
• be dead to the world
• be department
• be done in