impermeable

adj. 不可渗透的，不透水的

imperative, imperatively, imperceptible, imperceptibly, imperfect, imperfection, imperfectly, imperial, imperialism, imperialist, imperialistic, imperially, imperil, imperious, imperiously, imperiousness, imperishable, impermanence, impermanent, impermeability, impermissible, impersonal, impersonality, impersonally, impersonate, impersonation, impersonator, impertinence, impertinent, impertinently, imperturbability, imperturbable, imperturbably, impervious, imperviousness, impetigo, impetuosity, impetuous, impetuously, impetus,