indeclinable

Founding-era definition · Webster's 1828 American Dictionary

INDECLI'NABLE, adjective [Latin indeclinabilis; in and declino.] Not declinable; not varied by terminations; as, pondo, in Latin, is an indeclinable noun.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI

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