Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

mid-15c., enfrangen, "to violate," from Latin infringere "to damage, break off, break, bruise," from in- "in" (see in- (2)) + frangere "to break" (see fraction). Meaning of "encroach" first recorded c.1760. Related: Infringed; infringing.