ado = is (verb "to be/to stay" - present tense - he/she/it is - 3rd person singular) (some things Google found for "ado": a very common term; in English ado means "to do; doing; trouble" and is mostly used in set phrases such as "without further ado"; Much Ado About Nothing is a comedy play by William Shakespeare; ADO is an acronym for ActiveX Data Objects; an uncommon masculine first name; an uncommon last name; in French ado is a colloquial term for "teen, teenager" (shortened form of adolescent); name of cities in Nigeria, Pakistan, Ethiopia, Sudan and Afghanistan)
Word derivation for "is (he/she/it is)(to be/to stay)" :
Basque = dago, Finnish = on
Miresua = ado
My previous word for "is (he/she/it is)" was ango. One reason for the change is because neither the Basque word or the Finnish word have a consonant combination.
I know that the other conjugations of this verb start with E. Unfortunately I have no E available in either the Basque or the Finnish word. I decided not to cheat with letters to make this word edo.
My other word for is, from the other verb meaning to be, is oda. Interestingly, that's an anagram of ado. Or ado backwards.