jawbreaker
/ˈdʒɔːˌbreɪkə(r)/noun
1
- informal a word that is very long or hard to pronounce〈非正式〉音节很多的词; 难发音的词。
2
- chiefly N. Amer. a large gobstopper〈主北美〉大块硬糖, 大硬糖球。