Synonyms for impassable

Most common

impenetrable · impervious · impermeable · insurmountable · insuperable · unpassable · untravellable

All synonyms

Adjective

Antonyms

passable

All antonyms of impassable →

Definitions

1. adj. 1

   Incapable of being passed over, crossed, or negotiated.

Related words

Word family

impassableness impassible

Example sentences

• impenetrable The wall appeared to be smooth and impenetrable.
• impervious Mark almost became impervious to toxic co-workers.
• impermeable He glazed his pottery to make it impermeable to water.
• insurmountable Algeria's economic problems aren't insurmountable.
• insuperable Tom's agoraphobia often seems like an insuperable challenge.

Popularity over time

Use in printed books, per decade from 1850 to 2019.

By length

10 letters

impervious⁴, unpassable

11 letters

impermeable, insuperable

12 letters

impenetrable⁵

13 letters

untravellable

14 letters

insurmountable⁵

The small number after each word is its number of syllables (impervious⁴ = 4 syllables).