adj.
VERBS
▪ be
▪ become
ADVERB
▪ highly , very
▪
It is a highly ~ gas.
▪ easily , freely , readily
▪ completely , totally
▪ partially , partly , slightly
PREPOSITION
▪ in
▪
The salt was easily ~ in water.
Soluble is used with these nouns: ↑ aspirin , ↑ salt , ↑ substance