Encroach (upon) is a term that means to intrude upon or INFRINGE upon another's rights, property, or territory. The crossword solutions for this term are INFRINGE (8 letters), INVADE (6 letters), and IMPINGE (7 letters). All three words have similar meanings, but they differ in the degree of intrusion. INFRINGE implies a violation of a law or agreement, while INVADE implies a forceful entry into a place or situation. IMPINGE suggests a more subtle form of intrusion, such as an idea or influence.