spit
A four letter word meaning not kosher is: tref
An antonym is a word that means the opposite of another word. An antonym that can be used for the word expectorate is suppress.
The word pine can have that meaning.
A four-letter word for cooking fat is "lard".
into
stop or halt is a four letter word meaning the opposite of go.
A four letter word meaning the foundation of something is base.
The hot chicken soup made it easier for him to expectorate the phlegm from his lungs.
Rend is a four letter word that means to tear into pieces. Tear is also a four letter word meaning to pull apart.
A four letter word meaning to grow light as the sun rises is dawn.
Expectorate
Wash is a four letter word meaning "to clean with water".