Antonym of established

Antonyms of verb establish

1 of 8 senses of establish

Sense 1:

establish, set up, found, launch
Antonym of abolish (Sense 1)
=>abolish, get rid of

Antonyms of adj established

5 senses of established

Sense 1:

established (vs. unestablished), constituted

unestablished (vs. established)
unrecognized, unrecognised

Sense 2:

accomplished, effected, established

INDIRECT (VIA settled) -> unsettled

Sense 3:

conventional, established

INDIRECT (VIA orthodox) -> unorthodox

Sense 4:

established

INDIRECT (VIA proved) -> unproved, unproven

Sense 5:

established, naturalized

INDIRECT (VIA foreign) -> native