entered
en-tered
verb
Having gone or come into a place, system, or state.
"She entered the room quietly."
Thesaurus
Synonyms: introduce, insert, infix, enter, put down, record, go into, get in, come in, get into, go in, move into
Antonyms: chuck up the sponge, drop by the wayside, drop out, exit, fall by the wayside, get out, give up, go out, leave, quit, throw in, throw in the towel