impossibly

adv: impossibly difficult 极其困难.

imponderable, import, import duty, importance, important, important-looking, importantly, importation, importer, importunate, importunately, importune, importunity, impose, impose...on, imposing, imposingly, imposition, impossibility, impossible, impost, impostor, imposture, impotence, impotent, impotently, impound, impoverish, impoverished, impoverishment, impracticability, impracticable, impracticably, impractical, impracticality, impractically, imprecation, imprecise, imprecisely, imprecision,