1. Lofty spirits and unswerving pride

2. 3 He had an unswerving devotion to duty.

3. Unswerving cruelty will turn all folk against you.

4. 17 The general had an unswerving devotion to duty.

5. Antonyms for Anfractuous include straight, straightaway, direct, even, level, plumb, smooth, undeviating, unswerving and simple