v. 25B6; verb
litmus paper turns red on being immersed in acid : SUBMERGE, dip, dunk, duck, sink; soak, drench, saturate, wet.
new Christians were immersed in the river : BAPTIZE, christen; informal, dated dip; rare lustrate.
Elliot was immersed in his work : ABSORB, engross, occupy, engage, involve, bury; busy, employ, preoccupy; informal lose oneself in.