Diffidence/ˈdɪfɪdəns/ Definition 1 of 3Pro Tip 1/3Self-Esteem Link Diffidence often indicates a person doesn't value themselves highly. Despite his skills, his diffidence made him underestimate his own competence. Pro Tip 2/3Subtle Behavior Diffidence can be silent; not all shy people are openly timid. She had a quiet diffidence, seldom joining conversations unless encouraged. Pro Tip 3/3Misinterpreted as Unfriendly Sometimes diffidence can be mistaken for aloofness or disinterest. His diffidence at the party was misconstrued as snobbery.