表層形
腐る
クサル
動詞
腐る (クサル)
Kusaru · くさる — to rot, to go bad, to decay, to spoil, to fester, to decompose, to turn sour (e.g. milk); to corrode, to weather, to crumble; to become useless, to blunt, to weaken (from lack of practice)
Other ways to say “to rot” in Japanese →
腐る in rōmaji: kusaru.
動詞
一般
*
*
🔤 五段-ラ行 📐 終止形-一般
Updated: 2026年8月13日
📖 Grammar Information
| 表層形 (Surface) |
腐る
|
|---|---|
| 読み (Reading) |
クサル
|
| 品詞 (POS) |
動詞・一般・*・*
|
| 活用型 (Conj. Type) |
五段-ラ行
|
| 活用形 (Conj. Form) |
終止形-一般
|
| 表記 (Orthography) |
腐る
|
| 読み・基本形 |
クサル
|
| 表記・基本形 |
腐る
|
| 見出し語の読み |
クサル
|
💡 English Meaning
腐る means “to rot, to go bad, to decay, to spoil, to fester, to decompose, to turn sour (e.g. milk); to corrode, to weather, to crumble; to become useless, to blunt, to weaken (from lack of practice)” — full definition & examples →
🔗 Other Forms of 腐る
🃏 Flashcard — Test Yourself
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腐る
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Reading & Info
クサル
動詞一般**
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⚡ 五段 (Godan/U-verb) Conjugations
| ます形 (Polite) |
腐ります
|
| て形 (Te-form) |
腐って
|
| 過去形 (Past) |
腐った
|
| 否定形 (Negative) |
腐らない
|
| 意向形 (Volitional) |
腐りましょう
|
| 可能形 (Potential) |
腐れる
|
| 受身形 (Passive) |
腐られる
|
| 使役形 (Causative) |
腐らせる
|
💡
Did you know · 動詞
動詞 (verbs) come at the end of a Japanese sentence. They conjugate for tense, politeness, negation, and mood — this entry shows the base (dictionary) form.
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❓ About this entry
What is the difference between surface form and lemma? ▼
The surface form (腐る) is the exact text as it appeared in the corpus — it may be conjugated or inflected. The lemma (腐る) is the dictionary base form. For example, 食べた (surface) has the lemma 食べる.
What does the reading (pron) field mean? ▼
The reading shows the pronunciation in hiragana or katakana as recorded by UniDic. For kanji entries this is the standard reading of this specific surface form — which may differ from other readings of the same kanji.
What is UniDic? ▼
UniDic is a comprehensive Japanese lexicon developed by the National Institute for Japanese Language and Linguistics (NINJAL). It provides detailed morphological information for modern Japanese words, used in NLP tools like MeCab.
How do I use the conjugation table? ▼
The table shows the most common inflected forms of this verb. Click any "Copy" button to copy the form. Note: these are generated from the lemma 腐る based on its conjugation type (五段-ラ行).
How do I save this entry? ▼
Click the ★ save button in the word card above (you need to be logged in). Saved entries appear in your personal Saved Dictionary page for quick review later.