Like noun suffixes of Type 5 (section 3.3.5), these suffixes determine the verb’s syntactic role in the sentence.

-'a' (interrogative - yes/no questions)

This suffix forms yes/no questions, questions answered simply with "yes" or "no" (see section 6.4):

• cholegh'a' - do you see me? (legh - see)
• yaj'a' - does he/she understand? (yaj - understand)

-jaj (may, expressing a wish)

This suffix expresses a wish or hope for a future event, typically used in toasts or curses. It never combines with Type 7 aspect suffixes, with rare exceptions (such as -taHjaj):

• jaghpu'lI' DaghIjjaj - may you scare your enemies (ghIj - scare)
• tlhonchaj chIljaj - may they lose their nostrils (chIl - lose)

The next two suffixes turn verbs into nouns. See section 3.2.2 for more information..

-wI' (one who does, thing which does)

This suffix converts verbs into nouns that label a person or thing that is doing the verb:

• So'wI' - cloaking device (So' - cloak)
• baHwI' - gunner (baH - fire [a torpedo])
• joqwI' - flag (joq - wave, flutter)

-ghach (creates nouns from verbs)

In Klingon, verbs sometimes become nouns without any changes (like ta' - accomplish/accomplishment). However, verbs with suffixes cannot form nouns directly. The suffix -ghach transforms such verbs into nouns, usually for philosophical, technical, or formal contexts:

• lo'laHghach - value (lo'laH - be valuable)
• lo'laHbe'ghach - worthlessness (lo'laHbe' - be worthless)
• naDHa'ghach - discommendation (naDHa' - discommend)
• naDqa'ghach - re-commendation (naDqa' - commend again)

Nouns ending in -ghach are uncommon in everyday Klingon usage. For more detail, see section 6.2.6.

The remaining suffixes are used to create complex and compound sentences. Below is a brief overview; more details appear in section 6.2.0.

-chugh (if)

• DaneHchugh - if you want them (neH - want)
• choja'chugh - if you tell me (ja' - tell)

-pa' (before)

• choja'pa' - before you tell me (ja' - tell)
• qara'pa' - before I command you (ra' - command)

-mo' (because)

Identical to the Type 5 noun suffix -mo', this suffix provides a causal reason or explanation:

• bIqanmo' - because you are old (qan - be old)
• Heghpu'mo' yaS - because the officer died (Hegh - die, yaS - officer)

-DI' (as soon as, when)

• DaSeHDI' - as soon as you control it (SeH - control)
• qara'DI' - as soon as I command you (ra' - command)

-vIS (while)

The suffix -vIS always pairs with the continuous suffix -taH (Type 7).

• SutlhtaHvIS - while they negotiate (Sutlh - negotiate)
• bIQongtaHvIS - while you sleep (Qong - sleep)

-bogh (which, that)

This suffix marks relative clauses:

• qetbogh loD - a running manwhile they negotiate (Sutlh - negotiate)
• butlh ghajbogh nuv'e' - the person who has fingernail dirt (butlh - fingernail dirt, ghaj - have, nuv - person)

This suffix is detailed further in section 6.2.3.

-meH (for, in order to)

The suffix -meH indicates purpose.

• SuvwI' DevmeH paq - a book for guiding warriors (SuvwI' - warrior, Dev - guide, paq - book)
• ghojmeH taj - a knife for learning (ghoj - learn, taj - knife)

This suffix is detailed further in section 6.2.4.