frank

synonyms frank , candid , open , plain mean showing willingness to tell what one feels or thinks. frank stresses lack of shyness or secretiveness or of evasiveness from considerations of tact or expedience <frank discussions>. candid suggests expression marked by sincerity and honesty especially in offering unwelcome criticism or opinion <a candid appraisal>. open implies frankness but suggests more indiscretion than frank and less earnestness than candid <open in saying what they think>. plain suggests outspokenness and freedom from affectation or subtlety in expression <plain talk>.