i-adjective
unslacking; unceasing; tireless
Describes an effort, attitude, or pursuit that is persistent and does not let up; often used in formal or literary contexts.
彼のたゆみない努力が実を結んだ。
His tireless efforts bore fruit.
たゆみない研究の末、新薬が開発された。
After unceasing research, a new drug was developed.