staid

adjective2

1. •
   Not capricious or impulsive; sedate, serious, sober.

   • Put thy selfe / Into a hauiour of lesse feare, ere wildnesse / Vanquish my stayder Senses. — 1611
2. •
   (rare) Always fixed in the same location; stationary.

   • 'Tis not age or height alone / Can secure the staidest throne / From the reach of Change or Death,— […] — 1814