monosyllabic

monosyllabic /ˌmɑːnəsəˈlæbɪk/ adjective
monosyllabic
/ˌmɑːnəsəˈlæbɪk/
adjective
Britannica Dictionary definition of MONOSYLLABIC
1 
: having only one syllable : made up of words that have only one syllable
2 
: saying very little or responding with one-syllable words