in-: correct, convenient, secure, visible, active, il-: legal, logical, legitimate, literate, legible, ir-: regular, responsible, rational, relevant, reversible, im-: possible, patient, mature, polite, mortal, un- : happy, believable, important, known, usual, dis-: agree, appear, count, like, connect,

GttW B2+ U3 - Prefixes (part 1)

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