nail–bit·er 
/ˈneɪlˌbaɪtɚ/ noun
/ˈneɪlˌbaɪtɚ/ noun [singular] : something (such as a game or movie) that causes people to feel nervous because the ending is not known until the final moment
▪ This election's going to be a real nail-biter.
▪ This election's going to be a real nail-biter.
— nail–bit·ing /ˈneɪlˌbaɪtɪŋ/ adjective
▪ The election is heading for a nail-biting finish.
/ˈneɪlˌbaɪtɪŋ/ adjective ▪ The election is heading for a nail-biting finish.
