This is the 679th most frequent French word.
voire
Indeed; or even.
'Voire' is utilized here to introduce a more extensive possibility, strengthening the statement of the event's timeline.
Le voyage a duré une semaine, voire dix jours.
The trip lasted a week, or even ten days.
In this instance, 'voire' emphasizes an extension of doubt, adding depth to the speaker's skepticism.
Je ne suis pas certain de cet argument, voire il me semble faux.
I am not certain of this argument, or even it seems incorrect to me.
The term 'voire' is used here to emphasize or add to the attribute, indicating an even further assertion of the quality mentioned.