searchlight

n powerful lamp whose beam can be turned in any direction, used esp to discover enemy aircraft at night 探照灯.

seaman, seamanlike, seamanship, seamed, seamless, seamstress (Brit also sempstress), seamy, seance (also seance), seaplane, seaport, sear, search, search after, search for, search out, search-party, search-warrant, searcher, searching, searchingly, seascape, seashore, seasick, seasickness, seaside, season, seasonable, seasonably, seasonal, seasonally, seasoned, seasoning, seat, seat-belt (also `safety-belt), seating, SEATO, seaward, seawards, seaweed, seaworthiness,