monosyllabic  
adjective uk/ˌmɒn.ə.sɪˈlæb.ɪk/ us/ˌmɑː.noʊ.sɪˈlæb.ɪk/
  (PERSON)      
  disapproving话少而无礼的;寡言少语的 
saying very little in a way that is rude or unfriendly
  He grunted a monosyllabic reply. 他只咕哝出几个字算是回答。 
   (WORD)     
 language specialized单音节的 
containing only one syllable