INDECLINABLE
Etymology
Adjective
indeclinable (not comparable)
That one cannot decline; unavoidable.
(grammar, of a word) Not grammatically declinable.
Synonyms
• undeclinable
Hypernyms
• uninflectable
• invariable
Noun
indeclinable (plural indeclinables)
(grammar) A word that is not grammatically inflected.
Source: Wiktionary
In`de*clin"a*ble, a. Etym: [L. indeclinabilis: cf. F. indéclinable.
See In- not, and Decline.] (Gram.)
Definition: Not declinable; not varied by inflective terminations; as,
nihil (nothing), in Latin, is an indeclinable noun.
– n.
Definition: An indeclinable word.
Source: Webster’s Unabridged Dictionary 1913 Edition