staid (adj.)

• arid
• barren
• calm
• collected
• composed
• cool
• decorous
• demure
• dignified
• dry
• dull
• earnest
• earthbound
• formal
• frowning
• grave
• grim
• infertile
• literal
• long-faced
• moderate
• mundane
• no-nonsense
• priggish
• prim
• prosaic
• prosy
• quiet
• restrained
• rigid
• sedate
• serious
• serious-minded
• smug
• sober
• sobersided
• solemn
• somber
• starchy
• stiff
• stolid
• stuffy
• temperate
• thoughtful
• unimaginative
• uninspired
• uninventive
• unoriginal
• unromantic
• unsmiling
• weighty