'cot' and 'camp bed' In American English, a cot is a narrow bed for an adult. It is made of canvas fitted over a frame, and you can fold it up. You take it with you when you go camping, or you use it as a spare bed at home. In British English, a bed like this is called a camp bed.
Across is a preposition. It describes the relationship between two persons, places, or things. It is sometimes used with the preposition from. Example: That house is across the street. Cross is most commonly a verb or noun. Crossed is the past tense or past participle of the verb to cross.
30 Thus, it appears that in A over B sequences the preposition is used when B meets certain semantic criteria among which /SURFACE /, /THICK/, /SIDES/, /ANGLE/, /MOBILE/. Three of these criteria (/SURFACE/, /SIDES/, /ANGLES/) happen to correspond to the forms that the brain distinguishes first and foremost.