whereon

where·on

W5119800 (wâr-ŏn′, -ôn′, hwâr-)adv. On which or what: "the ground whereon she trod" (John Milton)."After a hurried breakfast ... he ascended ... to the covered roof pasture whereon his electric sheep 'grazed'" (Philip K. Dick).

whereon

(wɛərˈɒn) advon what thing or place?pronon which thing, place, etc

where•on

(ʰwɛərˈɒn, -ˈɔn, wɛər-)

conj. 1. on what or which. adv. 2. Archaic. on what? [1175–1225]
Translations
su chesu cui