hollows
hol-lows
verb
To form a cavity or depression within something; to excavate.
"The river slowly hollows out the riverbed."
noun
Low, sunken areas or depressions in a surface or landscape.
"Rainwater collected in the hollows of the field."
Thesaurus
Synonyms: hollow out, core out, hole, dig, excavate, fistulous, cannular, vasiform, tubelike, fistular, deep-set, cavernous
Antonyms: solid