septuagésimo
seventieth
sept-
seven
+
-ésimo
ordinal suffix
Septuagésimo means seventieth. It combines sept-0 (seven0) with -ésimo1 (ordinal suffix1), forming the ordinal for 'seventy'.
adjective
- seventiethSeventieth; the ordinal number corresponding to seventyEs mi septuagésimo cumpleaños. // It's my seventieth birthday.