To research a particular subject. / To begin eating heartily.

(idiomatic) To create a predicament or problem for oneself; to do something that leaves one with no good alternatives or solutions.

(obsolete) Contraction of into it.

Alternative form of sink one's teeth into

(idiomatic) To reach a stage of development or maturity where one has achieved strength and confidence, economic security, or respect and social acceptance.

Third-person singular simple present indicative form of come into being

present participle of come into being

(transitive, originally US, colloquial, dated) To beat up or seriously injure (a person); to badly damage (a thing).

simple past tense of come into being

(idiomatic) To make someone perform a task or duty, especially one they are not prepared or willing to do; to make something serve a function, especially one it was not designed or intended for.