1. With resolute determination
   "we firmly believed it"
   - firm, steadfastly, unwaveringly 
2. In a secure manner; in a manner free from danger
   - securely 
3. With firmness
   - hard

See also: firm

• trench mortar
• trench mouth
• trench warfare
• trenchancy
• trenchant
• trenchantly
• trencher
• trencherman
• trenching spade
• trend
• trend analysis
• trend line
• trend-setter
• trendily
• trendiness
• trendsetting
• trendy
• Trent
• Trent River
• Trental
• trente-et-quarante
• Trentino-Alto Adige
• Trento
• Trenton
• trepan