| FIR | make taut or tauter |
|---|---|
| FIR | become taut or tauter |
| FIR | strong and sure |
| FIR | unwavering in devotion to friend or vow or cause |
| FIR | securely fixed in place |
| FIR | pleasingly firm and fresh and making a crunching noise when chewed |
| FIR | not soft or yielding to pressure |
| FIR | marked by the tone and resiliency of healthy tissue |
| FIR | marked by firm determination or resolution |
| FIR | securely established |
| FIR | not subject to revision or change |
| FIR | not liable to fluctuate or especially to fall |