Editing Interlingue (section)

==== Affixes ====
The major prefixes and suffixes used in word derivation in Interlingue are added to either the present theme (infinitive minus -r), verbal root (infinitive minus two preceding vowels), or perfect theme (present theme + t or +s for verbs finishing with -d or -r) of verbs, as well as other types of speech. Some of the affixes used are:<ref name=":13" />

{| class="wikitable"
|+
!affix
!meaning
!before affix
!after affix
|-
| -abil/-ibil
|able
|posser (to be able)
|possibil (possible)
|-
| -ada/-ida
| -ade
|promenar (to stroll)
|promenada (a walk, a promenade)
|-
| -ar
|general verb
|sicc (dry)
|siccar (to dry)
|-
|bel-
|kinship by marriage
|fratre (brother)
|belfratre (brother-in-law)
|-
|des-
|cessation
|infectar (infect)
|desinfectar (disinfect)
|-
|dis-
|separation, dispersion
|membre (member)
|dismembrar (dismember)
|-
| -er-
|doer of verb
|lavar (wash)
|lavere / lavera / lavero (washer)
|-
| -ette
|diminutive
|dom (house)
|domette (cottage)
|-
|ex-
|ex-
|presidente (president)
|ex-presidente (ex-president)
|-
|ho-
|this
|semane (week)
|ho-semane (this week)
|-
|ín-
|in-, un-, etc.
|credibil (believable)
|íncredibil (unbelievable)
|-
| -ion
| -ion
|crear (create)
|creation (creation)
|-
| -iv
| -ive
|exploder (explode)
|explosiv (explosive)
|-
| -ment
| -ment
|experir (to experience)
|experiment (experiment)
|-
|mi-
|half
|fratre (brother)
|mifratre (half-brother)
|-
|mis-
|false (mis-)
|comprender (understand)
|miscomprender (misunderstand)
|-
|non-
|non-
|fumator (smoker)
|nonfumator (non-smoker)
|-
| -ntie
| -nce
|tolerar (tolerate)
|tolerantie (tolerance)
|-
| -or
| -er, -or
|distribuer (distribute)
|distributor (distributor)
|-
| -ori
| -ory
|currer (run)
|cursori (cursory)
|-
|per-
|through, all the way
|forar (pierce)
|perforar (perforate)
|-
|pre-
|before
|historie (history)
|prehistorie (prehistory)
|-
|pro-
|to the front
|ducter (lead)
|producter (produce)
|-
|re-
|re-
|venir (come)
|revenir (return)
|-
|step-
|step-
|matre (mother)
|stepmatre (stepmother)
|-
| -ura
| -ure
|scrir (write)
|scritura (scripture)
|}