さす・注す・点すsasu[1]atamadaka (head-high)

1. godan verb, transitive verbto pour; to add (liquid); to serve (drinks)esp. 注す
2. godan verb, transitive verbto put on (lipstick, etc.); to apply; to colour; to dyeesp. 点す

• Synonym注ぐそそぐNeutralMeans pouring in or into, in any amount, as in 「お茶を注ぐ」; the usual word for tea or water. 「注す」 is mostly for eye drops and oil, though it can serve drinks too.
• Related汲むくむNeutralScoops liquid up with a ladle or bucket, as in 「水を汲む」, and can also mean pouring into a cup; it focuses on drawing liquid out, while 「注す」 adds it in.
• Related酌むくむNeutralSpecifically for serving sake and drinking together; it also means to sympathize with someone's feelings, as in 「意を酌む」. Not used for eye drops or oil.

Use 「注す」 for adding liquid, as in 「目薬を注す」 and 「油を注す」; it can also serve drinks. For pouring tea or water 「注ぐ」 is more common, for scooping liquid up 「汲む」, and for serving sake 「酌む」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 注ぎ込そそぎこむ。
2. 加くわえる。
3. （「点ともす」とも）着色ちゃくしょくする。
4. 火ひをつける。
5. （「注さす」「差さす」とも）少すこし垂たらす。
6. 捺印なついんする。