noun
constant attendance; staying by someone's side
Describes being with someone continuously, often to care for or supervise them. Commonly used in the form 付きっきりで.
母は病気の祖母に付きっきりで看病した。
My mother nursed my sick grandmother, staying by her side constantly.
新入社員には先輩が付きっきりで指導する。
A senior colleague provides constant guidance to the new employee.