Pondering is deep or thoughtful consideration or reflection on a concept or subject.
Well, darling, the difference is as clear as day. 'Crescit sub pondere virtus' is in Latin, meaning "virtue grows under pressure," while 'crescit sub pondere virtue' is just a jumbled mess of Latin and English. Stick with the first one if you want to sound smart and not like you're trying to mix languages like a confused toddler.
That is the motto for the Irish family, McCann, or Mac Cana in Gaelic.
It looks like a thoroughly confused and mangled version of the motto of the McCann family: Crescit sub pondere virtus(Virtue thrives under oppression). The word tondere would make no sense in this context.
The phrase "Crescit Sub Pondere Virtus" is pronounced as "KRES-kit soob poh-DAY-ray VEER-toos." In Latin, the letter "c" is pronounced as a hard "k" sound, "v" is pronounced as "w," and "u" is pronounced as "oo." The stress in each word falls on the second-to-last syllable, following typical Latin pronunciation rules.