Thesaurus

(adj) : mutually related; corresponding

(n) : either of two correlative things; a pro-form; a non-personal pronominal, proadjectival, or proadverbal form, in Esperanto regularly formed, indicating which?, that, some, none, and every, as applied to people, things, type, place, manner, reason, time, or quantity, as: kiu 'who' (which person?), iu 'someone' (some person), tie 'there' (that place), ?ie 'everywhere' (all places), etc