Dum. Gxis. Cxirkaux.
"Dum" means "during", as "Dum mia tuta vivo", During my whole life. It
is not much used as a preposition, that is, before a noun, "en la dauxro
de" being better, as "En la dauxro de mia tuta vivo", In (the duration
of) my whole life; or the preposition is omitted altogether, as "La
tutan tagon mi laboradis", I used to work all day long. "Dum", meaning
"while, whilst", is often used at the beginning of a sentence. "Dume"
means meanwhile, or, in the meantime.
"Gxis" means "till, until, up to, as far as". "Atendu gxis Sabato", Wait
until Saturday. "Iru gxis la rivero", Go as far as the river.
"Cxirkaux" means "about" or "around, somewhere near" (more or less).
"Ili ludis cxirkaux la arbo", They played around the tree. "Cxirkaux
Majo ni foriros", About May we shall go away.