easily
in half, in two
She broke the bar in two and gave a piece to me.

apart, up
She broke the chocolate up into small pieces.

into
The glass broke into hundreds of pieces.

completely, irretrievably
Their marriage had broken down irretrievably.

eventually

break down and cry, break down in tears
She broke down in tears as she spoke to reporters.

Break is used with these nouns as the subject:
cloud, dam, dawn, day, daylight, egg, elastic, glass, heart, nail, nerve, news, scandal, spring, stem, storm, story, string, surf, swell, twig, voice, wave, weather, window, zip

Break is used with these nouns as the object:
agreement, ankle, arm, back, barrier, blockade, bond, bone, camp, ceasefire, ceiling, chain, chocolate, circuit, code, concentration, confidence, confidentiality, connection, consensus, continuity, contract, convention, cover, curfew, curse, cycle, date, deadlock, drought, egg, embargo, engagement, faith, fall, fast, finger, fingernail, flow, glass, habit, heart, hip, hold, hole, huddle, illusion, impasse, jaw, journey, law, lease, leg, limit, link, lock, mark, mirror, monopoly, mood, mould, nail, neck, news, nose, oath, pact, pane, parole, pelvis, pledge, precedent, promise, quiet, record, regulation, resistance, rhythm, rib, routine, rule, sabbath, seal, shoelace, siege, silence, skin, skyline, speed limit, spell, spine, spirit, spring, stalemate, stem, stereotype, stillness, stone, story, streak, stride, strike, string, surface, suspense, symmetry, taboo, tackle, tension, tie, toe, tooth, tradition, train, trance, treaty, truce, trust, twig, vase, vow, will, window, windscreen, word, wrist