-ir

From Latin -īre, the ending of the present active infinitive form of fourth conjugation verbs. Cognate with Spanish -ir, Italian -ire, Romanian -i and -î, etc.

-ir

1. A suffix forming infinitives of many verbs.

• Most verbs with infinitives in -ir are marked by the once-inchoative infix -iss- in many parts of their conjugation, as well as in various derived words; two such verbs are choisir (“to choose”) and pourrir (“to rot”). A fair number of these have English counterparts in -ish; three such are finir (“to finish”), nourrir (“to feed, to nourish”), and polir (“to polish”).
• A sizable group of verbs have infinitives in -ir but do not use the infix -iss-, and are otherwise fairly regular; these include, among others, the common verbs sortir (“to go out, to take out”), partir (“to leave”), dormir (“to sleep”).
• This suffix is spelled -ïr on a few verbs where the previous syllable ends in a vowel, such as haïr (“to hate”) and ouïr (“to hear”). Additionally, it is spelled -ire on the verb maudire (“to curse”), by analogy with the related but irregular verb dire (“to say”).
• Not all verbs whose infinitives happen to end in these letters can truly be said to have this suffix; in particular, a fair number of irregular verbs have infinitives in the unrelated suffix -oir.

This is a regular verb of the second conjugation, like finir, choisir, and most other verbs with infinitives ending in -ir. One salient feature of this conjugation is the repeated appearance of the infix -iss-.

• -er
• -ire
• -oir
• -re

Modeled after -ar and -is.

-ir

1. Used to denote the past infinitive of a verb.

   Me devas telefonir tu.

   I should have called you.

• -ar (present infinitive tense)
• -or (future infinitive tense)

From Latin -īre, the ending of the present active infinitive form of fourth conjugation verbs.

-ir

1. suffix used to form infinitives of second conjugation verbs

• Appendix:Old French verbs
• -er

From Latin -īre, the ending of the present active infinitive form of fourth conjugation verbs.

• (Portugal) IPA^(key): /ˈiɾ/
• (Paulistano) IPA^(key): /ˈi(ɾ)/
• (Caipira) IPA^(key): /ˈiɻ/
• (Carioca, Nordestino) IPA^(key): /ˈi(ʁ)/

-ir (first-person singular present indicative -o, past participle -ido)

1. A verb ending for infinitives.

From Latin -īre, the ending of the present active infinitive form of fourth conjugation verbs.

-ir (first-person singular present -o, first-person singular preterite -í, past participle -ido)

1. A verb ending for infinitives.

• -ar
• -er

Below are the suffixes for the regular conjugation of -ir verb