The infinitive form of the verb in Eastern Armenian (provided there are infinitives) is a suppletive 'linEl'. I am surprised to notice its resemblance to most Finno-Ugric words of similar meaning, e.g.
Finnish lienee (Potentialis of olla = to be in 1st p.sg. affirmative) Hungarian lenni (to be) North Sami leat (to be) Komi [lony] (to become, to be, to turn into)
What are the oldest records of the Armenian verb? Are there any correlates in Iranian and/or Paleo-Balcanic languages? Or maybe there are some correlates with languages from Anatolian group?