entries → 反之
TSUMUGU · TOCFL C1 (est.) · 詞
反之 word · TOCFL C1 (est.)
反之 ＝ 反 ＋ 之
ㄈㄢˇ ㄓ · fǎnzhī
conj — conversely, on the contrary; the other way around

字源 FORM — what the parts do

反to reverse, the opposite (相反)fǎn
之it (classical 之) — points back to what was just saidzhī
反之，相反的反，之乎者也的之。
關 · Related
反過來fǎnguòláithe other way around — the plain-speech version否則fǒuzéotherwise — a neighboring connector, but 'if not' rather than 'the reverse'