Borrowed from Latin affixus, perfect passive participle of affigere (from ad- + figere), equivalent to ad- + fix.

• (noun) IPA: /ˈæf.ɪks/
• (verb) IPA: /əˈfɪks/

affix (plural affixes)

1. That which is affixed; an appendage.

   Synonyms: addition, supplement, Thesaurus:adjunct

2. (linguistic morphology) A bound morpheme added to the word’s stem's end.

   Synonyms: adfix

   Hyponyms: suffix, postfix

3. (linguistic morphology, broadly) A bound morpheme added to a word’s stem; a prefix, suffix etc.

   Synonyms: afformative

   Antonyms: nonaffix

   Hyponyms: prefix, suffix, infix, circumfix, suprafix

4. (mathematics) The complex number a+bi associated with the point in the Gauss plane with coordinates (a,b).
5. (decorative art) Any small feature, as a figure, a flower, or the like, added for ornament to a vessel or other utensil, to an architectural feature.

• French: affixe
• German: Anhang, Anhängsel
• Portuguese: afixo
• Russian: добавле́ние

• French: affixe
• German: Affix, Zusatzsilbe
• Italian: confisso
• Portuguese: afixo
• Russian: а́ффикс
• Spanish: afijo

• Russian: а́ффикс

affix (affixes, present participle affixing; simple past and past participle affixed)

1. (transitive) To attach.

   Synonyms: join, put together, unite, Thesaurus:join

   to affix a stigma to a person

   to affix ridicule or blame to somebody

   • 1691, John Ray, The Wisdom of God Manifested in the Works of the Creation. […], London: […] Samuel Smith, […], →OCLC ↗:

     Should they [caterpillars] affix them to the leaves of a plant improper for their food […]

2. (transitive) To subjoin, annex, or add at the close or end; to append to.

   to affix a syllable to a word

   to affix a seal to an instrument

   to affix one’s name to a writing

3. (transitive) To fix or fasten figuratively; with on or upon.

   eyes affixed upon the ground

   • 1596, Edmund Spenser, An Hymn of Heavenly Beauty:

     Look thou no further, but affix thine eye/On that bright, shiny, round, still moving mass,/The house of blessed gods, which men call sky,/All sow'd with glist'ring stars more thick than grass...

• German: befestigen, anheften, anbringen
• Portuguese: afixar
• Russian: прикрепля́ть
• Spanish: fijar, pegar