Dictionary / Vocabulary / 欠かさず
かかさず
without fail; diligently; without missing a single ...
しかもやたらと散歩好きで、真冬だというのに、こうして一日二回の散歩は欠かさずに要求してくる。
Moreover, she liked walks so much that even in the middle of winter she would come like this to ask to go out twice a day without fail.
彼は毎週欠かさず母親に便りをする。
He never fails to write to his mother every week.
トムは一日も欠かさずここに来ている。
Tom comes here every single day.