再三再四 (さいさんさいし) Japanese meaning | KotomoraMeanings
1
adverb, noun
repeatedly; again and again; over and over
yojijukugo (four-character idiom)
Emphatic yojijukugo meaning doing something many times, often with a nuance of persistence or insistence. Used adverbially, often with する or 言う.
I asked again and again, but they wouldn't listen.