()()める

てをそめる
expression, verb phrase
to start (an activity); to get involved in; to engage in
1. to start; to begin; to get involved in (an activity)
To begin engaging in an activity or field. Can be neutral but often carries a negative connotation when referring to undesirable activities.
(わか)(ころ)絵画(かいが)()()めた。
I started painting when I was young.
2. to get one's hands dirty; to become involved in (wrongdoing)
To become implicated in or start participating in illegal, immoral, or undesirable activities.
(かれ)犯罪(はんざい)()()めてしまった。
He got involved in crime.
その世界(せかい)一度(いちど)()()めたら()けられない。
Once you get involved in that world, you can't get out.

IDIOM STRUCTURE:
() (hand) + を + ()める (to dye)

Literally "to dye one's hands" - implies getting deeply involved in something, as if the activity has stained one's hands.

NUANCE:

  • Can be neutral when referring to arts, hobbies, or professions
  • Often negative when referring to illegal or immoral activities
  • Suggests deep involvement, not superficial engagement
  • The "dye" metaphor implies lasting involvement that's hard to wash away

GRAMMAR:
〜に()()める - to get involved in ~

COMMON COLLOCATIONS:

  • 犯罪(はんざい)()()める - to get involved in crime
  • 悪事(あくじ)()()める - to engage in wrongdoing
  • 政治(せいじ)()()める - to get into politics
  • 芸術(げいじゅつ)()()める - to take up art

SIMILAR EXPRESSIONS:

  • ()()す - to get involved in (also often negative)
  • (くび)()()む - to stick one's nose into
  • (あし)()()れる - to step into, to enter (a field)

REGISTER:
Neutral to literary. Common in written Japanese and dramatic contexts.