The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
ger-1
DEFINITION:
To grow old. Oldest form *er2-, becoming *ger2- in centum languages. 1. Suffixed lengthened-grade form *gr-s-.ageratum, geriatrics, from Greek gras, old age. 2. Suffixed form *ger-ont-. geronto-, from Greek gern (stem geront-), old man. (Pokorny er- 390.)
-1
er
r
n (stem geront-), old man. (Pokorny 
