Acrid

The food is acrid

Acrid [ˈakrid]
Adjective

- having an extremely irritating, strong, unpleasant,  bitter taste or smell
- caustic in language or tone

Synonyms

acerbic, bitter

Usage

1. As we drove past the garbage dump, we were forced to close our windows as a result of the acrid smell

2. The acrid smell of burning bitumen often gave him unbearable headaches. 

Antonyms

sweet, pleasant

Other forms
Acrimonious (noun)