I.
noun
Hamper is used after these nouns: ↑ clothes , ↑ laundry , ↑ picnic
II.
verb
ADVERB
▪ badly , greatly , seriously , severely
▪
Rescue efforts were severely ~ed by the bad weather.
▪ further
Hamper is used with these nouns as the subject: ↑ injury
Hamper is used with these nouns as the object: ↑ ability , ↑ development , ↑ effectiveness , ↑ effort , ↑ progress , ↑ recovery