1. changeless的反义词

1. 不变的：changefully 多变地 | changeless 不变的 | changeling 低能儿

2.

2. 稳定的：50. 微小的:fine, minute, minuscule, tin... | 51. 稳定的:changeless, constant, immobile, invariable, stable, static, stagnant, stationary, steady | 52. 不稳定的: precarious, unstable, vertiginous, volat...

3. 固定不变的：changeirregularlyfluctuate 变幻 | changeless 固定不变的 | changeling 低能儿

4. 不变的/固定不变的/固定的：changefully /多变化地/易变地/ | changeless /不变的/固定不变的/固定的/ | changeling /调换儿/矮小丑陋的小孩/低能儿/

1. remaining the same for indefinitely long times

    Synonym: unalterable

2. not subject or susceptible to change or variation in form or quality or nature

    e.g. the view of that time was that all species were immutable, created by God

    Synonym: immutable

3. unvarying in nature

    e.g. maintained a constant temperature
           principles of unvarying validity

    Synonym: constantinvariantunvarying