present participle of set in

To attack. / To encourage someone, or an animal, to attack someone. / To be determined to do or achieve something.

Third-person singular simple present indicative form of set in

Initialism of Strategic Energy Technologies. Plan of the European Union. / Initialism of Stock Exchange of Thailand., the national stock exchange of Thailand.

Gene for a human protein involved in apoptosis, transcription and nucleosome assembly. / Initialism of Simulated Emergency Test., an amateur radio training exercise.

Third-person singular simple present indicative form of set by

To render something permanent, certain, or firm.

(idiomatic) Permanent; certain; firm.

(idiomatic) To trigger movement or progress; to get going.

A sleeve sewn into an armscye.