ger- / Indo-European roots
Examples of words with the root ger-: aggregate, agora, agoraphobia, allegory, category, congregate, cram, egregious, gregarious, greige, panegyric, segregate.
To gather.Oldest form *h2ger-.
1. Extended form *grem-. cram from Old English crammian, to stuff, cram, from Germanic *kramm-.
2. Reduplicated form *gre-g-. gregarious, greige; aggregate, congregate, egregious, segregate from Latin grex (stem greg-), herd, flock.
3. Basic form *əger-, with suffixed o-grade form *əgor-ā-. agora1, agoraphobia, allegory, category, panegyric from Greek ageirein, to assemble, and aguris, agorā, marketplace.
[Pokorny 1. ger- 382.]