木讷寡言

honest and unaffected but not talkative (idiom)

(bound form) tree / (bound form) wood / unresponsive; numb; wooden

wooden and slow of speech / slow-speeched / inarticulate / unsophisticated

to speak slowly / inarticulate

few / scant / widowed

taciturn / reticent

words / speech / to say / to talk