What does 怠る mean?
怠る is a Japanese verb meaning “to neglect, to fail” in English. It can also be translated as “to improve (of an illness)” depending on context. It is written as 怠る in kanji, おこたる in hiragana, and okotaru in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
あなたは「ありがとう」と言うことを怠った。
You neglected to say "Thank you."