There's more than one interpretation--even linguists disagree.
Ex: He arrived home safe.
1. an elliptical form for adverbial safe and sound
2. a verbal object; e.g., Apple's slogan Think Different
3. postverbal appositive; e.g., Think Big; Dress British, Think Yiddish.
4. non-Standard English; i.e., safe modifies the verb arrived, so it should be an adverb, safely, not an adjective.
Read more here, Who walks safe?
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