How to say "switch" in Japanese

• スイッチJLPT N3approx.Common
  nounThe noun for the physical device: a light switch, power switch, and by extension the act of switching something on or off. Use this when 'switch' is a thing or the flipping of a control.
  この仕掛しかけはスイッチで動うごく。↗

  This device is actuated by a switch.
• 切り替えるきりかえるJLPT N1approx.Common
  ichidan verb, transitive verbThe usual verb for switching between two states, modes, moods or channels, actively changing over from one to another. If you mean 'switch to a different setting or mindset', this is typically the word you want.
• 入れ替えるいれかえるCommon
  ichidan verb, transitive verbCovers switching in the sense of replacing or substituting one thing with another, swapping items or personnel. For replacing members or stock it is natural; for switching modes or topics it is generally not the word you want.
  窓まどを開あけてむしむしするこの部屋へやの空気くうきを入れ替いれかえて下ください。↗

  Will you open the window and air out this stuffy room?
• 切り替わるきりかわるCommon
  godan verb, intransitive verbThe intransitive counterpart of 切り替える: something switches or changes over by itself, as when a display or system switches to another state. Use it for the change happening, not for someone doing the switching.
• 転じるてんじるJLPT N1approx.Common
  ichidan verb, transitive verb, intransitive verbA formal, often written-style verb for a shift or reversal, as when a situation or attitude suddenly turns or switches direction. Seldom the everyday word for flipping a switch or changing a setting; it really conveys a change taking a different turn.
  災わざわいを転てんじて福ふくとしなさい。↗

  Turn your misfortune to account.

For the physical device or the verb 'to switch (on/off)', 「スイッチ」 is the word; for switching between states, roles or items use 「切り替える」 (or intransitive 「切り替わる」), while 「入れ替える」 implies replacing, and 「転じる」 is a formal shift.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• スイッチswitch
• 切り替えるきりかえるto change
• 入れ替えるいれかえるto replace
• 切り替わるきりかわるto change (to)
• 転じるてんじるto turn
• 転向てんこうconversion
• すり替えるすりかえるto switch (secretly)
• 点滅器てんめつきswitch (for a light)
• 転轍機てんてつきswitch
• 開閉器かいへいきswitch
• 交換機こうかんきswitch
• リバswitch
• 入れ毛いれげfalse hair
• 髢かもじhairpiece
• 入れ髪いれがみfalse hair
• スイッチ(Nintendo) Switch (video game console)
• 転路器てんろき(railroad) switch
• 乗り換えのりかえswitch (to another ideology, party, system, method, etc.)
• 乗り換えるのりかえるto change (to another ideology, party, company, etc.)
• 置き換えるおきかえるto replace
• 入れ替わるいれかわるto change (seats, shifts, etc.; with someone)
• 替わるかわるto be exchanged
• 葡萄葛えびかずらswitch (of hair)
• 宗旨替えしゅうしがえchange (of ideology, interest, taste, etc.)
• ポイントswitch