1. Causing dejection
   - blue, dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, dreary

See also: cheerless, depressing, uncheerful

• Hydrocharis morsus-ranae
• Hydrocharitaceae
• hydrochloric
• hydrochloric acid
• hydrochloride
• hydrochlorofluorocarbon
• hydrochlorothiazide
• Hydrochoeridae
• Hydrochoerus
• Hydrochoerus hydrochaeris
• hydrocolloid
• hydrocortisone
• Hydrocortone
• hydrocracking
• hydrocyanic
• hydrocyanic acid
• Hydrodamalis
• Hydrodamalis gigas
• HydroDIURIL
• hydrodynamic
• hydrodynamics
• hydroelectric
• hydroelectric turbine
• hydroelectricity
• hydroflumethiazide