(idiom) to meet or see each other frequently; said of people living or working in close proximity who constantly cross paths

(idiom) to see each other all the time; to meet or cross paths frequently because of living or working in close proximity

To lower one's head and remain silent, often due to shyness, deep thought, or shame.

smartphone addicts; a term for people who are constantly looking down at their phones or tablets in public

to bow one's head and admit one's guilt; to acknowledge one's crimes