1. Marked by firm determination or resolution; not shakable
   - firm, steadfast, steady, stiff, unbendable, unshakable, unwavering, unshakeable

See also: resolute

• catch sight
• catch some Z's
• catch up
• catch up with
• catch-22
• catchall
• catcher
• catcher's mask
• catchfly
• catching
• catchment
• catchment area
• catchment basin
• catchpenny
• catchphrase
• catchweed
• catchword
• catchy
• catclaw
• cate
• catechesis
• catechetic
• catechetical
• catechetical instruction
• calumniatory