to accept someone’s authority or give in to pressure
принять чье-то авторитет или поддаться давлению (prinyat' ch'ye-to avtoritet ili poddat'sya davleniyu)
"He refused to knuckle under to his boss’s unfair demands."
"Он отказался поддаться несправедливым требованиям своего начальника." (On otkazalsya **knuckle under** nespravedlivym trebovaniyam svoego nachal'nika.)
to have difficulty choosing between two options
to smile widely with great happiness
to do something easily and confidently
to thank someone genuinely and wholeheartedly
to stop doing something annoying or bad
to remain faithful and consistent toward your objectives
