timid a. 胆怯的
timidity n. 胆怯;胆小(timid胆怯的+ity)
intimidate v. 恐吓,威胁(im使+timid+ate→使人胆小→恐吓)
intimidation n. 恐吓
timorous a. 胆小的(tim+orus…..的→胆小的)