cater-cornered
adverb
diagonally or obliquely
See cater-cornered in American Heritage Dictionary 4
(kătˈər-kôrˌnərd, kătˈē-) also cat·er-cor·ner (-nər) or cat·ty-cor·nered or cat·ty-cor·ner (kătˈē-) or kit·ty-cor·nered or kit·ty-cor·ner (kĭtˈē-)
adjective Diagonal.
adverb In a diagonal position.