When

Adverb

 * When will they arrive?
 * Do you know when they arrived?
 * Do you know when they will arrive?
 * Do you know when they arrive?
 * Do you know when they will arrive?
 * Do you know when they arrive?

Conjunction

 * 1) At what time.
 * They were told when to sleep.
 * 1) At such time as.
 * I’m happiest when I’m working.
 * 1) As soon as.
 * I’ll do it when I get the time.
 * 1) At a time in the past,
 * It was raining when I came yesterday.

Pronoun

 * 1)  What time; which time
 * Since when do I need your permission?

Noun

 * 1) The time.
 * A good article will cover the who, the what, the when, the where, the why and the how.

Thesaurus
after all, again, albeit, all the same, although, anon, as far as, as long as, at all events, at any rate, at what time, at which, at which time, but, during which time, even, even so, for all that, howbeit, however, in any case, in any event, in what period, in which time, just the same, nevertheless, nonetheless, notwithstanding, on what occasion, on which occasion, rather, still, the while, though, upon which, what time, when as, whenever, whereas, whereupon, while, whilst, yet

Etymology
From when:, whan:, from  hwenne:, hwænne:, hwonne:, from, from. Cognate with wanneer:,  wann:,  wenn:,  𐍈𐌰𐌽:,  quando:. More at.

Adverb

 * American Sign Language:
 * Arabic:
 * Egyptian:
 * Armenian: երբ
 * Basque: noiz
 * Belarusian: калі
 * Bulgarian:
 * Chamicuro:
 * Chinese:
 * Mandarin: 甚麼時候, 什么时候, 何時, 何时
 * Czech:
 * Danish:
 * Dutch:
 * Esperanto:
 * Finnish: ,
 * French:
 * Old French:
 * German:
 * Hindi: (kab)
 * Hungarian:
 * Indonesian:
 * Irish:, cá huair, cén uair
 * Italian: quando
 * Japanese: ,


 * Korean: 언제
 * Kurdish:
 * Kurmancî: kengî
 * Soranî:
 * Latin:
 * Latvian: kad
 * Macedonian:
 * Malagasy: ovìana (past), rahoviana (future)
 * Norwegian:
 * Old Irish:
 * Persian: کی
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:
 * Sindhi:
 * Slovak: kedy
 * Spanish:
 * Swedish:
 * Telugu: ఎప్పుడు (eppuDu)
 * Thai: เมื่อ
 * Ukrainian: коли
 * Urdu: (kab)
 * Vietnamese: khi nào
 * Welsh: pryd
 * Xhosa: xa


 * French: quand
 * Old French:


 * Latvian: kad
 * Russian: когда

Conjunction

 * Albanian:
 * Arabic:
 * Armenian:
 * Belarusian:
 * Bulgarian:
 * Cherokee:
 * Chinese:
 * Mandarin:, , 幾時, 几时, ,
 * Czech:
 * Danish:
 * Dutch:
 * Estonian: millal
 * Finnish:, mihin aikaan, sitten, kun
 * French:
 * German:
 * Greek:
 * Hebrew:
 * Hindi:
 * Italian:
 * Japanese:, , ,
 * Korean:


 * Lao:
 * Latin: ,
 * Latvian: kad
 * Macedonian:
 * Norwegian:
 * Persian: وقتی, وقتی که
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:, в то время как
 * Scots:
 * Scottish Gaelic:
 * Serbo-Croatian: када, kada
 * Slovak: kedy
 * Slovene:
 * Spanish:
 * Swedish:
 * Thai: เมื่อใด
 * Ukrainian:
 * Urdu: (jab)
 * Vietnamese: khi nào,,  lúc nào
 * Yiddish:


 * Arabic: عندما,, حين
 * Armenian: երբ (yerb)
 * Chinese:
 * Mandarin: ,
 * Czech:
 * Danish:
 * Dutch: ,
 * Estonian:
 * Finnish:
 * French: ,
 * German:
 * Greek:
 * Hebrew:
 * Irish:
 * Italian:


 * Japanese: ,
 * Latvian: kad
 * Macedonian:
 * Norwegian:
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:
 * Scots:
 * Scottish Gaelic:
 * Spanish:
 * Swedish: ,
 * Thai: ขณะที่
 * Vietnamese:
 * Yiddish:


 * Czech:
 * Danish:
 * Dutch:, ,
 * Estonian:
 * Finnish:
 * French:
 * German: ,
 * Greek:
 * Irish:
 * Italian:
 * Japanese:, ;  したら


 * Latvian: kad
 * Macedonian:, штом
 * Norwegian:
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:
 * Scots:
 * Scottish Gaelic:
 * Spanish:
 * Swedish: ,


 * Czech:
 * Danish:
 * Dutch:
 * Estonian:
 * Finnish:
 * French:
 * German:
 * Greek:
 * Interlingua: quando
 * Irish:
 * Italian:
 * Japanese: ,


 * Latvian: kad
 * Macedonian:
 * Norwegian:
 * Persian: وقتی
 * Polish: ,
 * Portuguese:
 * Romanian:
 * Russian:
 * Scots:
 * Scottish Gaelic:
 * Spanish:
 * Swedish:


 * : кога (kogá)
 * : როცა (rotsa)
 * : mikor (1, 2), amikor (2, 3), amint (3)
 * : kande, kand
 * : kapan, saat, jika
 * : (bpēil nā)
 * : 언제 (eonje)
 * : kengî,
 * : kapan, saat, jika
 * : (bpēil nā)
 * : 언제 (eonje)
 * : kengî,
 * : kengî,


 * : rehefa (future)
 * : þā (1,2,3)
 * : când (1,2,3), atunci când (2,3)
 * : (mêua)
 * : þā (1,2,3)
 * : când (1,2,3), atunci când (2,3)
 * : (mêua)
 * : când (1,2,3), atunci când (2,3)
 * : (mêua)
 * : (mêua)

Pronoun

 * American Sign Language:
 * Bulgarian:
 * Czech:
 * Danish:
 * Dutch:
 * Esperanto:
 * Finnish:
 * French:
 * Old French:
 * German:


 * Hebrew:
 * Hungarian:
 * Indonesian:
 * Japanese: ,
 * Macedonian:
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:
 * Spanish:
 * Swedish:

Noun

 * Bulgarian: когата (kogáta)
 * Czech:
 * Danish:
 * Esperanto:
 * Finnish:
 * French:
 * German:
 * Hungarian:
 * Indonesian:


 * Italian:
 * Japanese: ,
 * Latvian: kad
 * Polish:
 * Portuguese:
 * Romanian: atunci când
 * Spanish: el cuando
 * Vietnamese:

Anagrams

 * hewn