The ending ~지다 can be used together with Descriptive Verbs to mean "to get" or "to become" that verb. For example, 춥다 means "to be cold," and 추워지다 means "to become cold" or "to get cold." You can use these new verbs as Action Verbs.
Last Sunday I did a full live classroom all about using this form (as well as compared it to ~게 되다), and you can watch the shortened version in just 8 minutes here.
This is a re-up of a column I wrote for 
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