The phrase is "by mistake", as two words. It means to do an action unintentionally.
Examples:
By mistake, I handed the policeman my credit card instead of my driver's license.
I put a cup of salt in the cake batter by mistake when I meant to add a cup of sugar.
Intending to douse my enemy with cold water, by mistake I drenched my best friend.
"You tripped me on purpose," he yelled. "No," I quickly explained, "it was by mistake! I was just stretching my legs!"
No it isn't as you haven't separated the 'by' from the 'mistake'. They are two different words.
This word is a very difficult word to spell since there are many ways that seem correct, when in fact there is only one correct answer. The proper way to spell this word is: schedule.
Barely is the correct spelling.
The correct spelling is one word "overprotective."
That is the correct spelling of the word "mimic" (to copy or imitate, or one who does this).
That is the correct spelling of "eat" (to consume as food).
Classmate is correct, as it is one word.
This word is a very difficult word to spell since there are many ways that seem correct, when in fact there is only one correct answer. The proper way to spell this word is: schedule.
Barely is the correct spelling.
Fingernail is the correct spelling. It is all one word.
That is the correct spelling, but not as one word. It is "fire extinguisher."
That is the correct spelling of the word "wrestler" (one who wrestles).
The correct spelling is one word "overprotective."
The correct spelling is as one word "bookkeeper" (accountant).
It is written as one word and the correct spelling is multidisciplinary.
The correct spelling is renege (to go back on one's word).
The correct spelling of the word is treason (disloyalty to one's country).
The correct spelling of the word is treason (disloyalty to one's country).