词根信息
词根: sting / stinct / stinguish 来源: 拉丁语 stinguere（刺、戳、标记、熄灭） 变体: sting-, stinct-, stinguish- 关联词根: spic（看）
sting / stinct — 刺、分离、熄灭
核心含义
拉丁语 stinguere = to prick, to mark, to quench。这个词根看似有三条不相关的含义，但都源于同一个动作——「刺」：
- “刺出标记 → 区分” → distinguish, distinct, distinction
- “刺灭（火焰）→ 熄灭/灭绝” → extinguish, extinct, extinction
- “从内部刺痛 → 内在冲动” → instinct
派生词网络
Tier 1 — 雅思高频核心
| 单词 | 拆解 | 字面义 | 实际义 |
|---|---|---|---|
| distinguish | dis-(分开) + stinguish(刺→标记) | 刺出标记来区分 | 区分、辨别 |
| distinct | dis-(分开) + stinct(刺→标记) | 区分开来的 | 明显不同的、清晰的 |
| extinct | ex-(出) + stinct(熄灭) | 彻底熄灭的 | 灭绝的、绝迹的 |
Tier 2 — 重要扩展
| 单词 | 拆解 | 字面义 | 实际义 |
|---|---|---|---|
| distinction | distinct + -ion | 区分的行为 | 区别、差别、优秀 |
| distinctive | distinct + -ive | 能区分的 | 独特的、有特色的 |
| extinguish | ex-(出) + stinguish(熄灭) | 彻底熄灭 | 熄灭（火）、消灭 |
| extinction | extinct + -ion | 灭绝的状态 | 灭绝、消亡 |
| instinct | in-(内) + stinct(刺) | 内在的刺痛 | 本能、直觉 |
例句（IELTS 场景）
- distinguish — It is crucial to distinguish between correlation and causation in research.
- 写作 Task 2 论证万能句：distinguish A from B / between A and B
- distinct — The two concepts are related but distinct — one refers to cause, the other to effect.
- 写作限定概念：distinct from / a distinct advantage
- extinct — Numerous species have become extinct due to human activities.
- 写作 Task 2 环境话题：become extinct / an extinct species
- distinction — A clear distinction must be made between legal and moral obligations.
- 写作定义概念：make a distinction / without distinction
- distinctive — Each culture has its own distinctive traditions and values.
- 写作/口语描述特征：a distinctive feature / style
- extinction — The extinction of bees would have catastrophic consequences for agriculture.
- 写作 Task 2 环境话题
- instinct — Our survival instinct drives us to avoid danger and seek safety.
- 写作/口语讨论行为：by instinct / natural instinct
常见搭配速记
| 搭配 | 含义 | 场景 |
|---|---|---|
| distinguish between A and B | 区分 A 和 B | 写作 Task 2 |
| distinguish … from … | 把…与…区分开 | 写作 |
| a distinct difference | 明显差异 | 写作 Task 1 |
| become extinct | 灭绝 | 写作环境话题 |
| on the brink of extinction | 濒临灭绝 | 写作环境话题 |
| a distinctive feature | 独特特征 | 写作/口语 |
| by instinct | 出于本能 | 口语 |
前缀拆解公式
[前缀] + sting/stinct/stinguish
dis- 分开 + stinguish → distinguish 区分（刺出标记分开来）
dis- 分开 + stinct → distinct 明显的（分开标记的）
ex- 出 + stinguish → extinguish 熄灭（彻底刺灭）
ex- 出 + stinct → extinct 灭绝（彻底熄灭的）
in- 内 + stinct → instinct 本能（内在的刺痛→冲动）
易混辨析
- distinguish vs differentiate：写作可互换，distinguish 更常用（distinguish between / from），differentiate 更正式
- distinct vs distinctive：distinct = 不同的、清晰的（a distinct accent），distinctive = 独特的、有辨识度的（a distinctive voice）
- extinct vs endangered：extinct = 已灭绝，endangered = 濒危（还没灭绝）——写作环境话题必须分清
- instinct vs intuition：instinct = 本能（生物性的），intuition = 直觉（经验性的）
相关词根
- spic（看）→ inspect, expect — “区分”的前提是”看清楚”