fingernail
Word family adjectivefingeredfingerlessnounfingeringfingerlingfingerboardfingerbowlfingerguardfingerholdfingerholefingermarkfingernailfingerpickfingerplatefinger-pointingfingerpostfingerprintfingerprintingfingerstallfingertipfinger
Human
fin·ger·nail /ˈfɪŋɡəneɪl $ -ɡər-/ ●●○ noun [countableC] 
HBHthe hard flat part that covers the top end of your finger 手指甲 SYN nail →5 see picture at 见图 hand1Examples from the Corpus
fingernail• Fielding knelt and ticked a fingernail against the sedimented glass of the fishtank.• She turned her thumb- and fingernails in and pinched, probing for painful pulses between the bones.• I could tell because she was nibbling her fingernails and then trying not to.• He dug his fingernails into the raw itchiness along his part.• He grew his fingernails long on the right hand, saying that made it easier to pluck the strings.• Her long fingernails clacked against the rim of a champagne glass.• Liz's fingernails were tingling, her nerves crawling with frustration.• Stop biting your fingernails.