Correct spelling


Correct spelling, explanation: this form is the correct one because the word brief means paper and comes from Latin breve (short as in a short piece of writing). Briefcase is thus a compound noun (brief + case). This shows that breifcase is a misspelling, which probably is due to pronunciation problems. Briefcase is the correct spelling.

Definition of briefcase:
noun, a type of business bag or case used to keep and carry documents and paper
I love this briefcase, is it real leather?
I will take the briefcase from my car and I will be right back.

Incorrect spelling


Incorrect spelling, explanation: breifcase is the wrong form because briefcase is a compound noun made from the words brief (short writing) and case (a place to keep something). Therefore briefcase is the only correct form – due to how we spell the word brief.