JLPT N3 · な-adjective

有効 (yuukou)

有効 (ゆうこう, yuukou) is a Japanese な-adjective meaning “valid; effective”. It appears in JLPT N3 vocabulary lists and is marked as a common word in JMdict.

Reading: ゆうこう
Romaji: yuukou
Word class: な-adjective
Level: JLPT N3 (unofficial)

Meaning

valid; effective · な-adjective, noun
yuko (judo) · noun

Example sentences

その切符は一週間有効です。

The ticket is valid for a week.

Tatoeba #208558

Sentences from the Tatoeba project, linked to this word in JMdict.

Conjugation of 有効

な-adjective. Plain and polite forms below; try any other word in the Japanese verb conjugator.

Form	Japanese	Reading
Present (plain)	有効だ	ゆうこうだ yuukouda
Present (polite)	有効です	ゆうこうです yuukoudesu
Negative	有効じゃない	ゆうこうじゃない yuukoujanai
Past	有効だった	ゆうこうだった yuukoudatta
Negative past	有効じゃなかった	ゆうこうじゃなかった yuukoujanakatta
Te-form	有効で	ゆうこうで yuukoude
Before a noun	有効な	ゆうこうな yuukouna
Adverb (~ni)	有効に	ゆうこうに yuukouni

Kanji in 有効

有

possess, have, existユウ・ウ・あ.る · 6 strokes

効

merit, efficacy, efficiencyコウ・き.く・ききめ · 8 strokes

Related words

Other vocabulary sharing a kanji with 有効.

有るあるto be有名ゆうめいfamous有無うむexistence or nonexistence有能ゆうのうable有利ゆうりadvantageous有機ゆうきorganic有料ゆうりょうfee-charging有難いありがたいgrateful有ゆうexistence国有こくゆうnational ownership固有こゆうcharacteristic (of)特有とくゆうcharacteristic (of)所有しょゆうpossession私有しゆうprivate ownership

Source: JMdict entry 1541290 (EDRDG, CC BY-SA 4.0). Level: unofficial JLPT list – how levels are assigned.