transom
Word family nountransomadjectivetransomed
tran·som /ˈtrænsəm/ noun [countableC] 1. a bar of wood that forms the top of the back part of a boat 〔船的〕艉构架,艉板 3. American EnglishAmETBB a small window over a door or over a larger window 门顶窗,楣窗,气窗 SYN British English fanlight Origin transom (1300-1400) Probably from Latin transtrum, from trans “across”