Wi-Fi; wireless LAN
Standard term for wireless local area network technology; used in both technical and everyday contexts.
See also: 無線ＬＡＮ
I connected to the café's Wi-Fi.
You can use free Wi-Fi at the café.
Please tell me the Wi-Fi password.
It's hard to get a Wi-Fi connection in this room.
I used the Wi-Fi at the station to send an email.
Variant without hyphen; less common but still seen.
Borrowed from English 'Wi-Fi', a trademark of the Wi-Fi Alliance.