What is the meaning of -x?

Used to represent a value that may vary: see x.

Used to replace a /ks/ sound, especially in monosyllabic words ending in -cks or -ks.

An abbreviation marker.

Used to replace a gendered suffix, such as in alumnx, Chicanx, Latinx.

Used to form the regular plurals of nouns and adjectives in -au and -eu.

Used to form the irregular plurals of a few nouns in -ou (which regularly add -s).

Used together with the particle ma to negate verbs and adverbs

Used on its own or with the particle la to express a negated imperative

a gender-neutral, normally not pronounced suffix that replaces -o and -a in nouns, adjectives and pronouns

a gender-neutral suffix that replaces -o and -a in nouns, adjectives and pronouns

Source: wiktionary.org

See also