- 2Betekenis: steadfastresolute untiring unfailing unflagging tireless persistentfirm constant persevering unyielding reliable unfaltering
- 3Betekenis: determineddiligent assiduous steadfast constantsteady resolute unflagging persevering
- 4Betekenis: resolutedetermined firm persevering indomitableunyielding unconquerable sturdy
- 5Betekenis: tenaciousenduring dogged immovable insistentindefatigable persevering persistent