tertio
thirdly
adverb tehr-SYOH Rare
Origin: Latin tertio, in third place
Usage Note
Tertio is a formal or academic enumeration adverb meaning 'thirdly', used in sequence after primo ('firstly') and secundo ('secondly'). It appears mainly in written or structured argumentation. In everyday speech, troisièmement is more common.
Examples
"Primo, secundo et tertio, voici mes arguments."
Natural Translation
First, second, and third, here are my arguments.

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