Tangy describes a taste that is sharp and fresh and wakes your mouth up. A squeeze of lemon over fish, cold thick yoghurt, salt-and-vinegar crisps, a good hard cheddar.
Tangy is a compliment, and that is the difference to learn. Sour means too sharp, and it hints that something has gone off; tangy means sharp on purpose and pleasantly so — pickles, barbecue sauce, a tangy dressing. The noun behind it is tang: a tang of lemon, a tang of salt in the air, which shows the word works for smells as well as tastes. It belongs to menus, packaging and food writing rather than to a chemistry report. The comparative is tangier, and the -y ending puts it in the same family as zesty and fruity.
1adjectivetangyHaving a sharp, fresh, pleasant taste.
“The dressing was tangy with lemon and mustard.”
Patterntangy + noun (sauce, cheese, flavour) · sharp and tangy · a tang
2adjectivesmellHaving a sharp, fresh smell.
“A tangy smell of seaweed came off the harbour.”
TANGy → like a TANGerine
Like a tangerine: sharp and fresh on the tongue, a little sour, and very pleasant.
Old Norse
tangi — pointed metal tool
Middle English
tange
English
tang
English, today
tangy
Built from
From tang + -y. tang comes from Middle English tange, variant of tonge (“tongs, fang”), from Old Norse tangi (“pointed metal tool”), perhaps related to Old Norse tunga (“tongue”). But see also Middle Dutch tanger (“sharp, tart, pinching”).
Etymology from Wiktionary, CC BY-SA