GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 549 quarantine (n) The enforced isolation of any person or place infected with contagious disease quarrelsome (adj) Irascible quarter (n) One of four equal parts into which anything is or may be divided quarterly (adj) Occurring or made at intervals of three months quartet (n) A composition for four voices or four instruments quarto (n) An eight-page newspaper of any size quay (n) A wharf or artificial landing-place on the shore of a harbor or projecting into it querulous (adj) Habitually complaining