(かさ)

かさむ
verb (godan)
to increase; to mount up; to pile up
1. to increase; to mount up
For amounts, especially expenses or quantities, to accumulate and become larger.
医療費(いりょうひ)(かさ)んで(こま)っている。
I'm struggling because my medical expenses keep mounting up.
予想(よそう)より費用(ひよう)(かさ)んだ。
The costs mounted up more than expected.
2. to bulk up; to take up more space
For physical volume to increase or become bulky.
荷物(にもつ)(かさ)んで()(はこ)びにくい。
The luggage has gotten bulky and is difficult to carry.

TRANSITIVITY:
自動詞(じどうし) (intransitive)
Pattern: Xが(かさ)

ASPECT (ている):
(かさ)んでいる - has accumulated (resultant state)

KANJI NOTE:
The kanji (かさ) is a rare character. This verb is often written in hiragana as かさむ.

COMMON COLLOCATIONS:

  • 費用(ひよう)(かさ)む - expenses mount up
  • 出費(しゅっぴ)(かさ)む - spending increases
  • 荷物(にもつ)(かさ)む - luggage becomes bulky
  • 年齢(ねんれい)(かさ)む - to get older (literary)

NUANCE:
Often implies a negative connotation, especially when referring to expenses or problems accumulating beyond expectations.