misunderstanding n.

"want of understanding, mistake as to the meaning of something," mid-15c., misunderstonding, verbal noun from misunderstand.

When misunderstanding serves others as an advantage, one is helpless to make oneself understood .... [Lionel Trilling, "Art and Fortune," 1948]

Meaning "dissension, a disagreement, a quarrel" is recorded by 1640s.