1
undeterred by sth
undeterred by 后接名词或名词短语，表示“没有被……吓住或打消念头”。
She was undeterred by the criticism.
她没有因批评而气馁。
未被吓住的；不气馁的
先理解核心含义，再看它在真实句子里的用法。
未被吓住的；不气馁的
not deterred or discouraged
She was undeterred by the criticism.
她没有因批评而气馁。
不气馁的；不退缩的。
Not deterred or put off; undiscouraged.
Undeterred by the rain, she continued her morning run.
她没有因下雨而退缩，继续晨跑。
He was undeterred by his first failure and tried again.
他没有因第一次失败而气馁，又试了一次。
The team remained undeterred despite the tight deadline.
尽管截止日期很紧，团队仍然没有退缩。
undeterred by 后接名词或名词短语，表示“没有被……吓住或打消念头”。
She was undeterred by the criticism.
她没有因批评而气馁。
remain undeterred 是系表结构，强调在困难面前保持不气馁的状态。
Despite the setbacks, the team remained undeterred.
尽管屡遭挫折，团队仍然没有气馁。
undeterred 可放在句首作状语，说明主语做动作时的心态。
Undeterred, he tried once more.
他没有气馁，又试了一次。
Not this
He undeterred by the failure and kept trying.
Use this
He was undeterred by the failure and kept trying.
undeterred 是形容词而不是动词，不能直接作谓语；需要加系动词 was 构成主系表结构。
Not this
She was undeterred to try again.
Use this
She was undeterred from trying again.
undeterred 后不接不定式 to do，而要用 from + 动名词表示‘不被阻止去做某事’，所以 to try 应改为 from trying。
Not this
He is undeterring by the danger.
Use this
He is undeterred by the danger.
undeterred 是 un- 加过去分词 deterred，表示‘未被吓住的’；undeterring 是现在分词，表示‘不吓唬人的’，语义不对，这里应用过去分词形式。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
仍然不气馁
Despite the delays, the team remained undeterred.
尽管一再延误，团队仍然不气馁。
不因失败而退缩
Undeterred by failure, she submitted her paper to another journal.
她没有因失败而退缩，把论文投给了另一家期刊。
在努力中毫不退缩；坚持不懈
The workers were undeterred in their efforts to finish the bridge on time.
工人们坚持不懈，努力按时建成大桥。
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把undeterred想成un（不）+ deterred（被吓退）：哪怕被吓，也绝不后退。
语域：formal 常见场景：新闻报道、正式演讲 undeterred 通常用于正式或书面语境，常见于新闻报道、演讲或记叙文中；口语里更常说 not discouraged 或 not put off。
The stressed syllable of undeterred is /tɜːd/, so all six words share the same final rhyme /ɜːd/: bird, heard, word, herd, stirred, deterred. Be careful with lookalikes: the verb 'deter' is /dɪˈtɜː/ (no final /d/), and words like 'error' /ˈerə/ and 'errand' /ˈerənd/ start with /e/, not /ɜː/. In non-rhotic accents like British RP, the 'r' after /ɜː/ is not pronounced as a separate consonant.
Dictionary facts from ECDICT, WIKTIONARY.