Chapter Five VOCAB Definition 38. Obscure N. not clearly seen or easily distinguished 39. Opaque ADJ. blocking the passage of radiant energy and especially light 40. Gnaw V. to bite or chew on with the teeth 41. Speculation N. assumption of unusual business risk in hopes of obtaining commensurate gain 42. Scowl V. to contract the brow in an expression of displeasure 43. Jabber V. to talk rapidly, indistinctly, or unintelligibly 44. Jeer V. to abuse vocally; taunt or mock 45. Indigo N. a blue dye obtained from plants, synthesized as a blue powder with a coppery luster 46. Formulate V. to put into a systematized statement or expression 47. Mimicry N. the action, practice, or art of imitating 48. Inarticulate ADJ. Incomprehensible; unable to speak with clarity 49. Gibbering N. words that are spoken , inarticulately, and often foolishly 50. Improvisation N. the act or art of making, inventing, or arranging offhand (extemporaneously) 51. Ludicrous ADJ. laughably and obviously absurd; foolish 52. Ineffectual ADJ. Insufficient to produce an effect; useless
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