ubi

also *kwi-, Proto-Indo-European root, stem of relative and interrogative pronouns.

It forms all or part of: cheese (n.2) "a big thing;" cue (n.1) "stage direction;" either; hidalgo; how; kickshaw; neither; neuter; qua; quality; quandary; quantity; quasar; quasi; quasi-; query; quib; quibble; quiddity; quidnunc; quip; quodlibet; quondam; quorum; quote; quotidian; quotient; ubi; ubiquity; what; when; whence; where; whether; which; whither; who; whoever; whom; whose; why.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit kah "who, which;" Avestan ko, Hittite kuish "who;" Latin quis/quid "in what respect, to what extent; how, why," qua "where, which way," qui/quae/quod "who, which;" Lithuanian kas "who;" Old Church Slavonic kuto, Russian kto "who;" Old Irish ce, Welsh pwy "who;" Old English hwa, hwæt, hwær, etc.

"whereness," 1670s, from Modern Latin ubietas, from Latin ubi "where" (see ubi).

"omnipresence," 1570s, from Modern Latin ubiquitas, from Latin ubique "everywhere," from ubi "where" (see ubi) + -que "and," also "any, also, ever," as a suffix giving universal meaning to the word it is attached to, from PIE root *kwe "and, -ever" (source also of Hittite -kku "now, even, and;" Sanskrit -ca, Avestan -ca "and, also, if;" Greek -te "and;" Gothic -uh "and, also," nih "if not").

Originally a Lutheran theological position maintaining the omnipresence of Christ.