Na-adjective (keiyodoshi)
very hungry; starving; famished
Onomatopoeic or mimetic word
お腹がぺこぺこです。I'm starved. Adverb (fukushi), Suru verb
bowing repeatedly; kowtowing; bowing and scraping; being obsequious; being servile
Onomatopoeic or mimetic word
Adverb (fukushi), Adverb taking the 'to' particle, Suru verb, Na-adjective (keiyodoshi)
denting; buckling; giving (in)
Onomatopoeic or mimetic word
Also written ぺこぺこ