スイッチ

すいっち
noun
switch
1. switch
A device for making or breaking an electrical connection, typically to turn something on or off.
Please turn on the switch.
スイッチを入れる = to turn on
I forgot to turn off the light switch.
スイッチを切る = to turn off
A sound comes out when you press the switch.
When you leave the room, please be sure to turn off the air conditioner switch.
The wall switch is old and has a poor connection, so the light won't turn on unless you press it several times.
2. switch, change
A change or shift from one thing to another.
Something switched on inside me.
Figurative use: getting motivated
I switched over to work mode.
スイッチを切り替える = to switch over
When I drink coffee in the morning, my brain switches on.
I listen to music before the match to switch on my focus.
When going from a day off back to a weekday, I have trouble switching my mindset and it's a problem.
スイッチが切り替わる = the switch flips (intransitive)

From English "switch." Used both literally (electrical device) and figuratively (mental shift).

COMMON PATTERNS:

FIGURATIVE USES:

NOTE:
The transitive ()れる (someone turns it on) vs. intransitive (はい) (it turns on) distinction is important: スイッチ()れる vs. スイッチ(はい).