IPA: //ˈpleɪnˌspoʊkən//
KK: /ˈpleɪnˌspoʊkən/
Someone who speaks in a clear and direct way, without trying to hide their thoughts or feelings.
Her plainspoken manner made it easy for everyone to understand her point of view.
Plainspoken → It is formed from "plain" (from Old French *plain*, meaning clear or flat) and "spoken" (the past participle of "speak", meaning to talk or express verbally). The word "plainspoken" describes someone who speaks in a clear, straightforward manner without ambiguity.
Think of someone who speaks in a 'clear' way ('plain') — that's why 'plainspoken' means to express thoughts simply and directly.