간간이 + verb (비가 간간이 내리다); ≈ 가끔, 때때로
now and then, occasionally; here and there
Example
창밖에서 간간이 새소리가 들려와요.
Now and then, I can hear birds singing outside the window.
Word parts
간 interval+간 interval
Literally 'interval after interval' plus adverb ending -이: things happening with gaps in between.
Related words