Verb reference
усилить
to strengthen / increase
PerfectiveType II
Imperfective partner
усиливать
to strengthen / increase ยท Type I
Fill the verified forms for усилить only. Its aspect partner is a separate reference and practice choice.
Present tense
Perfective verbs have no true present tense
The personal non-past forms of усилить describe a completed future action, so they are shown in the Future section instead.