completely (with a positive verb); not at all (with a negative verb)

voluntarily; willingly

to go forward, to advance, to progress / to improve, to progress

progress

sawdust charcoal

an electric multiple unit train

to stand, to place in an upright position / to release something physical but not solid or liquid / (Internet slang) to start (a thread)

sound; echo; voice

a sound / when used with a "hear" verb, a rumor or fame / news, tidings / a reply, response

(literary, rare) hiding; concealing oneself