zuru verb, transitive verb
take advantage of; seize an opportunity; follow blindly
Often used with nouns like 機会, 勢い, or 状況 to mean exploiting a situation or going along with momentum. The 'follow blindly' nuance appears in contexts like 人の意見に乗ずる.
See also: 乗じる
彼は好機に乗じて商売を拡大した。
He took advantage of the opportunity and expanded his business.
世論の流れに乗ずるだけでは、本当の改革はできない。
Just going along with the tide of public opinion won't bring real reform.
zuru verb, transitive verb
Mathematical term for multiplication. More commonly expressed as 掛ける in everyday speech; 乗ずる is formal and often used in written math contexts.
See also: 乗じる
3に5を乗ずると15になる。
Multiplying 3 by 5 gives 15.