English → Latin
“castle” in Latin
arxstronghold, castle, citadel, fortress, acropolis; height, summit, pinnacle, top, peak (since castles were often built oncastrumcastle, fort, fortress; several soldiers' tents situated together; hence, a military camp, an encampmentcastellumcastle, fort, citadel, fortress, stronghold; a dwelling in a high place; a shelter, stronghold, defence, refugesomniōto dream; to daydream, think idly; to talk idly
The English word castle itself goes back to Latin castrum, through castellum.
Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864
castle
arx (on an eminence, and fortified): castrum (fort: rare): castellum (small fort, fort). Governor of a castle, *castelli praefectus. Castles in the air, somnia. To build castles in the air, somnia sibi fingere (Lucr.): in aere piscari (Plaut., according to Riddle).
Quick answer
- What is the Latin word for castle?
- The usual Latin words for “castle” are arx, castrum, castellum; also somniō. The right choice depends on the sense; see the distinctions below.
Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.