形容詞 inexorable:

1. not to be placated or appeased or moved by entreaty
   同義詞：grim, relentless, stern, unappeasable, unforgiving, unrelenting
2. impervious to pleas, persuasion, requests, reason
   同義詞：adamant, adamantine, intransigent

1. An inexorable opponent; a feeling of inexorable doom.
   一個(gè)冷漠的對(duì)手; 對(duì)無情毀滅的預(yù)感
2. Facts are inexorable.
   事實(shí)是無情的。
3. Our reform made an inexorable march of progress.
   我們的改革取得了勢不可擋的進(jìn)展。
4. He made an inexorable demand.
   他提出一個(gè)無情的要求。

in.ex.o.ra.ble

adj.（形容詞）
Not capable of being persuaded by entreaty; relentless:
無動(dòng)于衷的：不為懇求所動(dòng)的；無情的：
例句：
an inexorable opponent; a feeling of inexorable doom.See Synonyms at inflexible
一個(gè)冷漠的對(duì)手；對(duì)無情毀滅的預(yù)感參見 inflexible

來源：
Latin inexôr3bilis
拉丁語 inexôr3bilis
in- [not] * see in-
in- [不] *參見 in-
exôr3bilis [pliant] from exôr3re [to prevail upon] ex- [intensive pref] * see ex- ôr3re [to argue]
exôr3bilis [易曲的] 源自 exôr3re [勸導(dǎo)] ex- [強(qiáng)調(diào)性前綴] *參見 ex- ôr3re [爭執(zhí)]

【引伸】
inex.orabil.ity 或
inex.orableness
n.（名詞）
inex.orably
adv.（副詞）