(adj): vs. unperceptive) -- (having the ability to perceive or understand; keen in discernment
(adj): mentally upset over possible misfortune or danger etc
(adj): vs. easy) -- (lacking a sense of security or affording no ease or reassurance
(adj): in fear or dread of possible evil or harm
(adj): predicate) (vs. unafraid) -- (filled with fear or apprehension