1. incredulous   PRECIPITATE   PERFUNCTORY   GULLIBLE   LETHARGIC   Hint Half-n-half Clue   2. impervious   LANGUOR   HALCYON   PERMEABLE   GUSTO   Half-n-half Clue   3. believer   LATENT   HERETIC   LITHE   PERMEABLE   Half-n-half Clue   4. original   HACKNEYED   GRANDIOSE   GRISLY   PERPETUAL   Half-n-half Clue   5. stationary   LETHARGIC   GRISLY   GREGARIOUS   PERIPATETIC   Half-n-half Clue   6. obvious   LATENT   GRISLY   LAX   LAUDATORY   Half-n-half Clue   7. homogeneous   LIMPID   LIVID   HETEROGENEOUS   LOQUACIOUS   Half-n-half Clue