set-in

(verb) enter a particular state. Synonyms: set in, kick in. Examples: "Laziness set in." "After a few moments, the effects of the drug kicked in."

(verb) blow toward the shore. Synonyms: set in. Example: "That gale could set in on us with the next high tide."

(verb) become established. Synonyms: set in. Example: "Winter has set in."