niin kauan kuin

== Finnish == === Etymology === niin (“as, so”) + kauan (“long, for long”) + kuin (“as”) === Phrase === niin kauan kuin as long as (for some period of time) (idiomatic) so long as, as long as, assuming, provided that, if (depending upon some condition or requirement) ==== Synonyms ==== (for some period of time): niin pitkään kuin (provided that): kunhan, niin pitkään kuin