「飲む」 (nomu) means "to drink." This verb is used for consuming liquids. Like 食べる, it's a transitive verb and takes a direct object (the drink) marked by the particle を (o). For example, 「水を飲みます。」(Mizu o nomimasu.) means "I drink water."

飲(の)むは水(みず)やジュースなどの液体(えきたい)を飲(の)むこと。水(みず)を飲(の)みます。