下不来

awkward / embarrassed / cannot be accomplished

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

no; not so / (bound form) not; un-

to come / to arrive / to come round / ever since / next

to be put on the spot / to find oneself in an awkward situation