To feel or sense; to experience (written or slightly formal equivalent of 感じる).
彼は胸に痛みを感ずると言った。
He said he felt a pain in his chest.
その場の空気に違和感を感ずる人が何人かいた。
A few people felt something off about the atmosphere there.
外国語に触れて新たな文化を感ずることができた。
By encountering a foreign language, I was able to sense a new culture.
To be moved, touched, or impressed (a formal/written way to express 感動する or 感じる in that sense).
彼女の優しさに深く感ずった。
He was deeply moved by her kindness.
式典のスピーチに多くの出席者が感ずった。
Many attendees were moved by the speech at the ceremony.
To become infected with an illness (archaic/literary usage).
疫病に感ずる者が次々と出たと古い記録にある。
Old records say that people became infected with the epidemic one after another.