What does 足す mean?
足す is a Japanese verb meaning “to add (numbers)” in English. It can also be translated as “to take care of (e.g. one's business)” depending on context. It is written as 足す in kanji, たす in hiragana, and tasu in romaji. This word is part of JLPT N4 vocabulary.
Example sentences
６０にするためには１７に何を足せばよいの。
What do you have to add to 17 to get 60?
もしコーヒーが濃すぎれば、いくらかお湯を足して下さい。
If the coffee is too strong, add some more water.