The suffix -m appears consistently at the end of verbs that have a plural subject, marking the plurality of the verb to agree with that subject. The suffix appears whether or not the verb has a pronominal-prefix, and appears in both the draft and later stages of Adûnaic.

There is only one example where the plural-verb suffix does not appear: the pseudo-aorist verb form phursâ of phurus- “to gush, flow”. This (along with its gloss “to-gush”) lends weight to the idea that it may be a special form, perhaps an infinitive.