Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
plainspoken is an adjective meaning "using simple and direct language". It carries 2 recorded senses.
characterized by directness in manner or speech; without subtlety or evasion
“blunt talking and straight shooting”
“a blunt New England farmer”
“I gave them my candid opinion”
“forthright criticism”
“a forthright approach to the problem”
“tell me what you think--and you may just as well be frank”
“it is possible to be outspoken without being rude”
“plainspoken and to the point”
“a point-blank accusation”
Definitions, synonyms and semantic relations for plainspoken come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.