[521] impermeable meimperme.able.me
[522] imperturbable meimperturb.able.me
[523] implacable meimplac.able.me
[524] implantable meimplant.able.me
[525] imponderable meimponder.able.me
[526] importable meimport.able.me
[527] impracticable meimpractic.able.me
[528] impregnable meimpregn.able.me
[529] impressionable meimpression.able.me
[530] improbable meimprob.able.me