-isso

Latin

Etymology

Borrowed from Ancient Greek -ίζω (-ízō), possibly via a variant -ίσσω that existed in the dialect of Tarentum in Southern Italy (as in σαλπίσσω, λακτίσσω).

Suffix

-issō (present infinitive -issāre, perfect active -issāvī, supine -issātum); first conjugation

1. Used to form similative verbs from nouns and adjectives.

Usage notes

• This form of the suffix occurs mainly in the comedies of Plautus, written at a time before the use of the letter Z in Latin words loaned from Greek was firmly established. In later time periods, the usual spelling became -izō (a variant -idiō also developed).

Conjugation

   Conjugation of -issō (first conjugation)

indicative		singular			plural
		first	second	third	first	second	third
active	present	-issō	-issās	-issat	-issāmus	-issātis	-issant
	imperfect	-issābam	-issābās	-issābat	-issābāmus	-issābātis	-issābant
	future	-issābō	-issābis	-issābit	-issābimus	-issābitis	-issābunt
	perfect	-issāvī	-issāvistī	-issāvit	-issāvimus	-issāvistis	-issāvērunt, -issāvēre
	pluperfect	-issāveram	-issāverās	-issāverat	-issāverāmus	-issāverātis	-issāverant
	future perfect	-issāverō	-issāveris	-issāverit	-issāverimus	-issāveritis	-issāverint
passive	present	-issor	-issāris, -issāre	-issātur	-issāmur	-issāminī	-issantur
	imperfect	-issābar	-issābāris, -issābāre	-issābātur	-issābāmur	-issābāminī	-issābantur
	future	-issābor	-issāberis, -issābere	-issābitur	-issābimur	-issābiminī	-issābuntur
	perfect	-issātus + present active indicative of sum
	pluperfect	-issātus + imperfect active indicative of sum
	future perfect	-issātus + future active indicative of sum
subjunctive		singular			plural
		first	second	third	first	second	third
active	present	-issem	-issēs	-isset	-issēmus	-issētis	-issent
	imperfect	-issārem	-issārēs	-issāret	-issārēmus	-issārētis	-issārent
	perfect	-issāverim	-issāverīs	-issāverit	-issāverīmus	-issāverītis	-issāverint
	pluperfect	-issāvissem	-issāvissēs	-issāvisset	-issāvissēmus	-issāvissētis	-issāvissent
passive	present	-isser	-issēris, -issēre	-issētur	-issēmur	-issēminī	-issentur
	imperfect	-issārer	-issārēris, -issārēre	-issārētur	-issārēmur	-issārēminī	-issārentur
	perfect	-issātus + present active subjunctive of sum
	pluperfect	-issātus + imperfect active subjunctive of sum
imperative		singular			plural
		first	second	third	first	second	third
active	present	—	-issā	—	—	-issāte	—
	future	—	-issātō	-issātō	—	-issātōte	-issantō
passive	present	—	-issāre	—	—	-issāminī	—
	future	—	-issātor	-issātor	—	—	-issantor
non-finite forms		active			passive
		present	perfect	future	present	perfect	future
infinitives		-issāre	-issāvisse	-issātūrum esse	-issārī, -issārier1	-issātum esse	-issātum īrī
participles		-issāns	—	-issātūrus	—	-issātus	-issandus
verbal nouns		gerund				supine
		genitive	dative	accusative	ablative	accusative	ablative
		-issandī	-issandō	-issandum	-issandō	-issātum	-issātū

¹The present passive infinitive in -ier is a rare poetic form which is attested.