brave ≠ cowardly [ˈkauədlɪ]

clever ≠ stupid

confident ≠ shy

friendly ≠ unfriendly

generous ≠ mean

hard-working ≠ lazy

honest ≠ dishonest

kind ≠ unkind

optimistic, cheerful ≠ pessimistic

pleasant ≠ unpleasant

relaxed, easy-going ≠ tense

reliable [rɪˈlaɪəbl] ≠ unreliable

responsible ≠ irresponsible

sociable [ˈsəuʃəbl] ≠ unsociable

strong ≠ weak