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incessant; constant; continuous; perpetual; everlasting
絶え間無い騒音が続いた。
Incessant noise continued.
工事の期間は絶え間無かった騒音に悩まされた。
During the construction period, I was tormented by constant noise.
親は絶え間無く子供を気にかけている。
Parents worry about their children without ceasing.