"Groon" is probably misspelled. Trying groin instead Definition of groin
groin has definitions from the field of anatomy
1
[ noun ] (anatomy) the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals

Synonyms

inguen

2
[ verb ] build with groins

Examples

: "The ceiling was groined"

3
[ noun ] a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
*