The word 'sour' is酸っぱい (suppai) in Japanese.
Example:梅干しが酸っぱくておいしい (umeboshi ga suppakute oishii) - "Umeboshi are sour and/yet delicious."
suppai
If you mean carboxylic ACID: yes that is (a bit) sour
"Sour look" is an idiom for an expression of distaste or annoyance.
A sour face is usually pursed lips, squinted eyes, and sucked in cheeks. It doesn't necessarily mean one ate something sour, but it looks as if they did.
Yes
sour
Tasting sour
a hateful/mean/unpleasant person
Deniva does not mean anything in Japanese.
"Olga" is not a Japanese word or name, so it doesn't mean anything at all in Japanese. Did you mean, "What is the name "Olga" translated to in Japanese?"
The name 'Collin' does not mean anything in Japanese, but it can be written in Japanese as: コリン
Kaitlyn does not mean anything in Japanese, but can be written in Japanese as: ケイトリン