Breakdown of Ему надо отдохнуть во время перерыва.
он
he / it (for a masculine noun) / it (for a neuter noun)
надо
must, need to
перерыв
break
отдохнуть
to rest (perfective)
во время
during
Elon.io is an online learning platform
We have an entire course teaching Russian grammar and vocabulary.