by mistake

in error; accidentally. I'm sorry. I came into the wrong room by mistake. I chose the wrong road by mistake. Now we are lost.

without intending to I'm sorry – I dialed your number by mistake.

Erroneously, as in He took my coat by mistake. [c. 1700]

Name	Pronounced	Usage
Ellie	['eli]
Cheftzi-Bah	-	Biblical Hebrew
Thaddeus	[θæ'di(:)əs]
Enyinnaya	-	Western African, Igbo
Cates	[keits]
Sawyl	-	Welsh