Hydrous: hydrated, containing water
Example: [In a hydrous environment, water is the main constituent]

Hygiene: sanitation, cleanliness, the science concerned with the maintenance of health, sanitization
Example: [Domestic hygiene is the regulation of home and family sanitation and hygiene in the health interest of each individual within the family]

Hygienic: clean sanitary
Example: [It is not hygienic]

Hyperactive: overactive
Example: [Hyperactive children]

Hyperbole: exaggeration
Example: [The blurb on the back of the book was full of the usual hyperbole – ‘enthralling’, ‘fascinating’ and so on]

Hyperborean: arctic, situated in extreme north, cold
Example: [the hyperborean blasts brought snow and ice to the countryside]

Hypercritical: faultfinding
Example: [some people are hypercritical in the demands of perfection]

Hypertension: elevated blood pressure
Example: [a new drug for hypertension]

Hypnosis: An artificial trance-sleep.

Hypnotism: An artificially induced somnambulistic state in which the mind readily acts on suggestion.

Hypochondria: imaginary illness morbid anxiety about health
Example: [I thought the doctor was going to accuse me of hypochondria]

Hypochondriac: a person who suffers from obsessive anxiety about their health, neurotic
Example: [The pill eater is a hypochondriac and very likely his doctor knows it]

Hypocrisy: pretense, two-facedness, insincerity, duplicity, sanctimoniousness
Example: [Our highest wisdom is the law of hypocrisy which we call diplomacy]

Hypocrite: One who makes false professions of his views
Example: [He’s a hypocrite]

Hypocritical: two-faced deceiving
Example: [Their accusations of corruption are hypocritical – they have been just as corrupt themselves]

Hypodermic: Pertaining to the area under the skin.

Hypoglycemic (Hypoglycaemic): low blood sugar
Example: [As a diabetic she was accustomed to the occasional hypoglycemic attack]
English Dictionary Cum Vocabulary Word List for GMAT, SAT, GRE, GATE, TOEFL, IELTS, TOEIC, CAT, LSAT, ACT, SSC, BANK PO& Other exams

Hypothesis: assumption subject to proof
Example: [Several hypotheses for global warming have been suggested]

Hypothetical: speculative theoretical
Example: [a hypothetical example]

Hysteria: frenzy, delirium, extreme or uncontrollable emotion, emotional instability, psychological disorder
Example: [The diagnosis of hysteria was established by the absence of any evidence of organic disease and by the history of the case]