(bound form) to pour into; to flow into; to inject; (bound form) to focus (one's spirit, gaze etc) on a single point; to concentrate; (bound form) stake (in gambling); classifier for stakes, sums of money, transactions or beams of light; variant of 註|注[zhu4]

to focus; to concentrate; to give one's full attention

stake (in a gamble); (what is at) stake

to pour; to pour down (of rain); to lay a bet

(idiom) to concentrate one's attention completely; with rapt attention