油断
Japanese
| Kanji in this term | |
|---|---|
| 油 | 断 |
| ゆ Grade: 3 |
だん Grade: 5 |
| on’yomi | |
Etymology
Unclear, with multiple theories.
- From the story of the 油鉢 (yuhatsu, “pot of oil”) in the Mahāparinirvāṇa Sūtra (大般涅槃経); see 大般涅槃経#油断大敵.
- 譬如世間有諸大眾，滿二十五里。王敕一臣持一油缽，經由中過，莫令傾覆。若棄一滴，當斷汝命。 [Classical Chinese, trad.]
- Pìrú shìjiān yǒu zhū dàzhòng, mǎn èrshíwǔ lǐ. Wáng chì yī chén chí yī yóubō, jīngyóu zhōng guò, mò lìng qīngfù. Ruò qì yī dī, dāng duàn rǔ mìng. [Pinyin]
- For example, in our world there is a large crowd, filling 25 li. The king ordered a minister: "Carry a pot of oil and pass through the crowd; do not let it tip. If a single drop falls out, your life shall end."
譬如世间有诸大众，满二十五里。王敕一臣持一油钵，经由中过，莫令倾覆。若弃一滴，当断汝命。 [Classical Chinese, simp.]
- Sound change from 寛に (yuta ni).
- There is a lamp in Enryaku-ji (延暦寺) that has been alight since the time of Saichō (最澄), its founder, and 油断 (literally “oil + end”) refers to not letting it go out.
The term is not understood in other parts of the Sinosphere.
Derived terms
- 油断大敵 (yudantaiteki, “unpreparedness is the greatest enemy”)
Verb
油断する (hiragana ゆだんする, rōmaji yudan suru)
- to be caught off-guard; to be unprepared
- 油断するな
- yudan suruna
- don't let [me, them, …] catch you off-guard; keep your guard up; stay alert
- 油断するな
Conjugation
Conjugation of "油断する" (See Appendix:Japanese verbs.)
| Stem forms | ||||
|---|---|---|---|---|
| Imperfective (未然形) | 油断し | ゆだんし | yudan shi | |
| Continuative (連用形) | 油断し | ゆだんし | yudan shi | |
| Terminal (終止形) | 油断する | ゆだんする | yudan suru | |
| Attributive (連体形) | 油断する | ゆだんする | yudan suru | |
| Hypothetical (仮定形) | 油断すれ | ゆだんすれ | yudan sure | |
| Imperative (命令形) | 油断せよ¹ 油断しろ² |
ゆだんせよ¹ ゆだんしろ² |
yudan seyo¹ yudan shiro² | |
| Key constructions | ||||
| Passive | 油断される | ゆだんされる | yudan sareru | |
| Causative | 油断させる 油断さす |
ゆだんさせる ゆだんさす |
yudan saseru yudan sasu | |
| Potential | 油断できる | ゆだんできる | yudan dekiru | |
| Volitional | 油断しよう | ゆだんしよう | yudan shiyō | |
| Negative | 油断しない | ゆだんしない | yudan shinai | |
| Negative continuative | 油断せず | ゆだんせず | yudan sezu | |
| Formal | 油断します | ゆだんします | yudan shimasu | |
| Perfective | 油断した | ゆだんした | yudan shita | |
| Conjunctive | 油断して | ゆだんして | yudan shite | |
| Hypothetical conditional | 油断すれば | ゆだんすれば | yudan sureba | |
| ¹ Written imperative ² Spoken imperative | ||||
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