Another word for furtively

Dron was disconcerted, glanced furtively at Alpatych and again lowered his eyes.

Paul looked around furtively.

Thence he furtively sailed with Mar to France, a broken man, leaving his army to shift for themselves.

Her purchaser is the leader of a "college" that proceeds to furtively conduct experiments on Octavian after his birth to determine if he, as an African American, is genetically inferior to white people of European descent.