Human, Hand, Finger, Arm, Non-verbal communication, sign language, forms, self-expression, gestures, posture, spontaneously, unconsciously, people, hide, feelings, intonation, communication channels, hands, handshake, denial, support, rejection, argumentation, together, at the same time, science, kinesics, body language, trust, palms, protection, negative, category, sort, kind, acknowledgment, faith, sensitivity, argument, hand, prosody, speech, skin, palm, skill, debate, gesture