つかえる

to stick; to get stuck; to get caught; to get jammed; to clog

to be unavailable; to be busy; to be occupied; to be full

to be piled up (e.g. of work)

to halt (in one's speech); to stumble (over one's words); to stutter; to stammer

to feel blocked (of one's chest or throat, due to grief, anxiety, illness, etc.); to feel pressure; to feel pain