sandbag

nouns

a bag filled with sand; used as a weapon or to build walls or as ballast
is a type of (narrower)
a flexible container with a single opening
"he stuffed his laundry into a large bag"

verbs

treat harshly or unfairly
is a type of (narrower)
treat unjustly; do wrong to
compel by coercion, threats, or crude means
"They sandbagged him to make dinner for everyone"
hit something or somebody as if with a sandbag
downplay one's ability (towards others) in a game in order to deceive, as in gambling
is derived from
entails
represent as less significant or important
is a type of (narrower)
give false or misleading information to
protect or strengthen with sandbags; stop up
"The residents sandbagged the beach front"
is a type of (narrower)
gain strength
"His body strengthened"