Verb complexes
Mirja verbs can be extremely complex, and verb complexes can include a significant number of potentially separate lexical roots. In effect, Mirja seems to be in a state where its previous multi-word verb complexes were analysed as single words, resulting in not only significant amounts of noun incorporation but also multimorphemic sequences that straddle the boundary between one verb with suffixes and multiple serialised verb roots. Some subsequent changes have taken place since that wholesale reanalysis, though; the most notable of which is that noun incorporation has been restricted to only generic / nonspecific objects and specific objects must be separate words. It's also the case that Mirja verb complexes can now only have one marking for most grammatical categories (which now comes after any incorporated nouns); something that may not have been the case previously.
Basic verbs
Despite the relatively high ceiling on verb complex complexity, the most simple permissible sentence in Mirja is a single verb root. There is no need for a verb to carry any inflection at all—there's no agreement morphology, and all other categories either have an unmarked default or are allowed to be fully unspecified.
e
eat
'[subj] eats [it]'