It means "Yes, commander" in a military context. It is what one would say to a female superior in the Israeli army.
"Ken" also means nest, as in a bird's nest.
If you mean the spanish spelleing of haha (indicating laughter), in Hebrew you would write חחח if you mean the German expression meaning yes yes, in Hebrew that would be ken ken (כן כן) otherwise, Ja ja is not a real word.
Ken and in Hebrew כן
Ken (כן)It literally means "so" or "thus"ken
If you mean the name Cain (in Hebrew Qayyin, קין), it means redeemed or bought. If you are spelling the word ken (כן) with American accent, it means "yes". Americans and other Ashkenazic Jews pronounce it kayn, but it's really pronounced ken.
Pronounced Ken
ken (קן)
It's ungrammatical, but it means "Yes but I don't have Hebrew letters" (a Hebrew keyboard).(It should be ken aval ein li otiyot ivriyot).כן, אבל אין לי אותיות עבריותNote that there are websites, such as the Branah site, that have virtual Hebrew keyboards that can type Hebrew via your English keyboard.
ken, atah yachol (to a man) ken, at yechola (to a woman)
ken, adoní! (כן ××“×•× ×™)
kenyata = ×§× ×™××˜×”
bird's nest = ken (קן)