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Absence of pretence,deceit etc
willingness or readiness to receive (especially impressions or ideas); "he was testing the government's receptiveness to reform"; "this receptiveness is the key feature in oestral behavior, enabling natural mating to occur"; "their receptivity to the proposal"
characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive
without obstructions to passage or view; "the openness of the prairies"