精通|せいつうseitsuu[0]heiban (flat)
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- noun, suru verb, intransitive verbbeing well versed (in); being well acquainted (with); being familiar (with); having a thorough knowledge (of); being an authority (on)
- noun, suru verb, intransitive verb(a boy's) first ejaculation; spermarche; semenarche
Conjugation
| Dictionary form | 精通する(せいつうする) |
|---|---|
| Polite (masu) | 精通します(せいつうします) |
| Negative (nai) | 精通しない(せいつうしない) |
| polite (masen) | 精通しません(せいつうしません) |
| classical zu / nu | 精通せず・精通せぬ(せいつうせず・せいつうせぬ) |
| Past (ta) | 精通した(せいつうした) |
| polite (mashita) | 精通しました(せいつうしました) |
| Past negative (nakatta) | 精通しなかった(せいつうしなかった) |
| polite (masen deshita) | 精通しませんでした(せいつうしませんでした) |
| Te form | 精通して(せいつうして) |
| Potential | 精通できる(せいつうできる) |
| Passive | 精通される(せいつうされる) |
| Causative | 精通させる(せいつうさせる) |
| Causative passive | 精通させられる(せいつうさせられる) |
| Conditional (ba) | 精通すれば(せいつうすれば) |
| tara | 精通したら(せいつうしたら) |
| Volitional | 精通しよう(せいつうしよう) |
| polite (mashou) | 精通しましょう(せいつうしましょう) |
| Imperative | 精通しろ(せいつうしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym熟知じゅくちNeutralVery close to 「精通」: knowing a matter thoroughly, as in 「事情を熟知する」. 「熟知」 stresses knowing the facts clearly, while 「精通」 stresses command of a whole field.
- Related熟練じゅくれんNeutralSkilled technique, as in 「熟練工」. It stresses hands-on proficiency, while 「精通」 stresses thorough knowledge of a subject.
- Related習熟しゅうじゅくWrittenWritten-style word for becoming proficient through practice, as in 「操作に習熟する」; it stresses skill built up step by step.
- Related熟達じゅくたつWrittenProficiency carried to the level of 「精通」; used relatively rarely and leaning to written or formal prose.
- Antonym無知むちNeutralAntonym: lacking knowledge. It is the opposite of 「精通」 in the sense of being well versed in something.
- Antonym未熟みじゅくNeutralAntonym: immature or not yet skilled; the opposite of 「精通」 as fully mastered expertise.
Use 「精通」 for deep command of a field, as in 「法律に精通する」. For hands-on skill say 「熟練」, for knowing a matter clearly 「熟知」; 「習熟」 and 「熟達」 are written-style words for proficiency gained by practice. Opposites: 「無知」 (ignorance) and 「未熟」 (immaturity).
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


