watch over, see
看 centers on directing one's gaze to observe or supervise: watching over someone or something, or simply seeing with attention.
看 combines 龵 (a variant of 手, hand) above 目 (eye), suggesting a hand shading the eye to look carefully. This is a well-established component explanation.
The top part looks like a hand (龵) held above an eye (目). Picture someone shielding their eyes from the sun to watch over a distant scene.
For カン, imagine a guard watching over a camp with a can of food: can -> カン, and the guard keeps a careful eye on everything.
nursing; (army) nurse
signboard; sign; billboard; hoarding; doorplate
prison guard; warder; jailer; gaoler
nursing (a patient)
to look after (often medically); to take care of
pretty girl who attracts customers to come inside a shop
overlooking; turning a blind eye
seeing through (e.g. someone's lies); reading (e.g. thoughts); penetrating; detecting
nursing; caring for the sick
to care for (the sick); to nurse; to attend (someone's deathbed)
operating room nurse
Yamazaki University of Animal Nursing
leading player; prima donna; box-office star
Mie Prefectural College Of Nursing
Kyushu University of Nursing and Social Welfare
the two leading actors (in a play); the two star players; the two distinctive features; the two main items (attractions)
Kyoto College of Nursing
(female) private nurse; patient attendant
attendant nurse; private nurse; patient attendant
College of Nursing Art and Science, Hyogo