Synonyms of impermissible

impermissible

adjective

ˌim-pər-ˈmi-sə-bəl 

as in prohibited

that may not be permitted

trial juries must be able to discern the difference between a permissible inference and impermissible speculation

Synonyms & Similar Words

• prohibited
• forbidden
• banned
• inappropriate
• unacceptable
• illegal
• taboo
• outlawed
• improper
• unlawful
• barred
• unauthorized
• proscribed
• illicit
• interdicted
• verboten
• unbearable
• unsuitable
• objectionable
• unendurable
• illegitimate
• excluded
• intolerable
• unseemly
• unlicensed
• rejected
• refused
• prevented
• ineffable
• disallowed
• unmentionable
• precluded
• revoked
• stopped
• discouraged
• vetoed
• suppressed
• unsanctioned
• blocked
• repressed
• hindered
• disapproved
• shut out
• obstructed
• impeded
• ruled out

Antonyms & Near Antonyms

• permissible
• allowable
• acceptable
• appropriate
• permitted
• permissive
• legal
• legitimate
• lawful
• tolerable
• authorized
• endorsed
• approved
• bearable
• accepted
• endurable
• certified
• OK
• licensed
• allowed
• accredited
• sanctioned
• warranted
• sufferable
• granted
• promoted
• mandatory
• supported
• suitable
• required
• commanded
• encouraged
• proper
• unobjectionable
• condoned
• ordered
• accorded
• vouchsafed
• countenanced
• tolerated
• seemly
• brooked

Example Sentences

Recent Examples of impermissible

The league reprimanded the Aces for impermissible player benefits in 2023, docking Las Vegas a 2025 first-round draft pick, so stripping more draft capital as a punishment would not have been unprecedented. — Sabreena Merchant, New York Times, 26 July 2026

The board would be able to suspend or prohibit any investment found to be impermissible. — Garrett Downs, CNBC, 11 June 2026

Court records show that Sorsby has acknowledged making thousands of impermissible bets totaling at least $90,000 during his time at Indiana, Cincinnati and Texas Tech. — Stephen Hawkins, Chicago Tribune, 8 June 2026

Now, DeSantis and his legislative collaborators argue that their own 2022 map created a racial gerrymander, Broward County’s District 20, that’s impermissible under the federal Constitution. — Sun Sentinel Editorial Board, Sun Sentinel, 2 June 2026