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.