imperturbable

adj. 沉着的,泰然自若的,镇静的

imperil, imperious, imperiously, imperiousness, imperishable, impermanence, impermanent, impermeability, impermeable, impermissible, impersonal, impersonality, impersonally, impersonate, impersonation, impersonator, impertinence, impertinent, impertinently, imperturbability, imperturbably, impervious, imperviousness, impetigo, impetuosity, impetuous, impetuously, impetus, impiety, impinge, impious, impiously, impish, impishly, impishness, implacable, implacably, implant, implantation, implausibility,