adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
stingily; in a miserly way
Describes acting in a cheap, penny-pinching manner, often with the と particle or as a する verb.
See also: けち
彼はいつもケチケチしていて、友達にコーヒーすらおごらない。
He's always so stingy that he won't even treat his friends to a coffee.
Don't be so tightfisted—let's eat out once in a while.
adverb
naggingly; pesteringly
Rare adverbial use for complaining or nagging in a petty way; less common than the stingy sense.
彼女はケチケチと文句ばかり言っている。
She keeps nagging and complaining about every little thing.