inaudible, quiet, silent / calm, tranquil / still, stopped and not moving / not busy

かも知れません: (polite) Synonym of かも知れない (ka mo shirenai, “may, might, perhaps”)

かもしれない: perhaps

may; might / probably; maybe; perhaps

direction, order / (military) command / (military) commander

to direct, to order

may, might, perhaps

test, trial

(polite) Synonym of かも知れない (ka mo shirenai, “may, might, perhaps”)

become known / be found out, come to light