1
the stem of [something]
词干是单词去掉词缀后剩下的部分。
The stem of the word 'happiness' is 'happy'.
单词 'happiness' 的词干是 'happy'。
茎；叶柄；花梗；羽干
先理解核心含义，再看它在真实句子里的用法。
茎；叶柄；花梗；羽干
the main stalk of a plant, or a thin stalk supporting a leaf or flower; also the shaft of a feather
The stem of the word 'happiness' is 'happy'.
单词 'happiness' 的词干是 'happy'。
家族的血统；祖先的种族或世代。
The stock of a family; a race or generation of progenitors.
词干
(linguistics) the form of a word after all affixes are removed
家族的分支。
A branch of a family.
茎
a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
The rose stem has sharp thorns, so wear gloves when you cut it.
玫瑰花的茎上有尖刺，所以剪花时要戴手套。
AI contextual example
She put the flower in a vase and trimmed the bottom of the stem at an angle.
她把花插进花瓶，把茎的底部斜着修剪了一下。
AI contextual example
The bamboo stems swayed gently in the wind.
竹茎在风中轻轻摇曳。
AI contextual example
thematic vowels are part of the stem
主题元音是词干的一部分
WordNet
词干是单词去掉词缀后剩下的部分。
The stem of the word 'happiness' is 'happy'.
单词 'happiness' 的词干是 'happy'。
固定短语，意为'完全地，从头到尾'，原指船首到船尾。
The ship was cleaned from stem to stern.
这艘船被从头到尾彻底清洁了一遍。
用于描述植物的茎。
The rose has a long, thin stem.
这朵玫瑰有一根细长的茎。
Not this
The stem of the oak tree is very tall.
Use this
The trunk of the oak tree is very tall.
中文'树干'常被直接译为'stem'，但英语中'stem'多指草本植物的茎，木本植物的主干应用'trunk'。
Not this
There are many stem on the plant.
Use this
There are many stems on the plant.
'stem'作为可数名词，复数形式应为'stems'，中国学习者常因中文无复数变化而遗漏-s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
脑干
The brain stem controls breathing and heart rate.
脑干控制呼吸和心率。
干细胞
Scientists are studying stem cells to treat diseases.
科学家正在研究干细胞以治疗疾病。
植物茎
The plant stem supports the leaves and flowers.
植物的茎支撑着叶和花。
花茎
She cut the flower stem at an angle.
她斜着剪下了花茎。
词干
In linguistics, the word stem remains after removing affixes.
在语言学中，去掉词缀后剩下的就是词干。
杯脚
He held the stem of the glass carefully.
他小心地握住玻璃杯的杯脚。
从头到尾；彻底地
They inspected the ship from stem to stern before setting sail.
他们启航前把船从头到尾检查了一遍。
Use stem naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象花茎(stem)撑起花朵，也撑起单词：去掉前后缀后留下的“词干”就是主干。
语域：mixed 常见场景：botany、linguistics、everyday objects stem 作名词时，通常表示植物的茎或物体的细长柄（如酒杯、烟斗），这类用法比较常见于日常生活和自然描述，语气中性；在语言学中，“词干”的用法多用于语法分析，属于正式术语。正式程度随语境变化，建议按使用场景判断。
与 stem /stɛm/ 押韵的有 gem /dʒɛm/、hem /hɛm/、them /ðɛm/、condemn /kənˈdɛm/（注意 condemn 中的 n 不发音）。theme /θiːm/ 和 steam /stiːm/ 拼写相近，但元音是长音 /iː/，与 stem 不押韵。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.