かかりきり

noun

being completely occupied with; devoting oneself entirely to

Describes a state where one is so absorbed in a single task or person that they cannot attend to anything else. Often used with ～になる or ～だ.

• 最さい近きん、仕し事ごとにかかりきりで、家か事じが全ぜん然ぜんできていない。

  Lately I've been completely tied up with work and haven't been able to do any housework at all.

• 母ははは病びょう気きの祖そ母ぼにかかりきりだ。

  My mother is completely occupied with caring for my sick grandmother.