Related Clues:
- Inexorable
- Resistant to pressure
- "Goody Two Shoes" singer
- Impervious to appeals
- British New Wave singer
- Implacable
- Unalterable
- Like some parental tones
- Hard, as a mattress
- Business compact
- Impervious to pleas or persuasion
- Insistent he was a new romantic in the 1980s
- Like some tofu
- Insistent girl should meet male model
- Business organisation