any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention
well matched; having the same quantity, value, or measure as another; "on equal terms"; "all men are equal before the law"
make equal, uniform, corresponding, or matching; "let's equalize the duties among all employees in this office"; "The company matched the discount policy of its competitors"
be identical or equivalent to; "One dollar equals 1,000 rubles these days!"
be equal to in quality or ability; "Nothing can rival cotton for durability"; "Your performance doesn't even touch that of your colleagues"; "Her persistence and ambition only matches that of her parents"
not changeable or subject to change; "a fixed and unchangeable part of the germ plasm"-Ashley Montagu; "the unchangeable seasons"; "one of the unchangeable facts of life"
(Greek mythology) a beautiful princess loved by Cupid who visited her at night and told her she must not try to see him; became the personification of the soul