於いて
おいて · oite · JLPT N1 · noun
astatine
📍 於 = at (literary kanji) + いて = te-form of いる (to be): at + being
Written mostly in kana as おいて in modern Japanese, it is a formal way to say at, in, or on a place. Break it down: 於 means at, and いて is the te-form of いる, to exist.