adverb
fortiter
fortiter (comparative fortius, superlative fortissimē)
Classical[ˈfɔr.tɪ.tɛr]Ecclesiastical[ˈfɔr.ti.ter]
Meaning
- strongly, powerfully
- bravely, boldly
In the readers how our graded readers gloss it

bravely
fortiter — in Viri Romae Facillimi, ch. 11
Lewis & Short A Latin Dictionary, 1879
fortĭter, adv., v. fortis
I. fin.
Origins
Proto-Indo-European *-teros? Latin -ter Latin fortiter From fortis (“strong, mighty”) + -ter.