Unappetizing food does not look or smell attractive and does not make you want to eat it.

If you overcook pasta before freezing it, its texture will be unappetizing once it's defrosted. 如果你在冷冻意大利面之前煮过头了，一旦解冻，口感就会变得很倒胃口。

not attractive or pleasant

The waterfront is distinctly unappetizing: a mixture of broken concrete, raw sewage, and piles of garbage tossed over garden walls. 滨水区显然让人大倒胃口：破碎的混凝土、未经处理的污水、扔在花园墙上的一堆堆垃圾，如此种种混在一起。