增加一个字母s变成新单词: 
thirsty:
thirsty发音: /ˈθɜːstɪ/ .
释义:口渴的
例句:
If you are thirsty, you feel a need to drink something. 
Drink whenever you feel thirsty during exercise.
锻炼时一感到口渴就喝水
举一返三:
room--broom扫帚 wing ---swing 飘摇 thirty---thirsty 口渴  an--any  eαr--year   here--there   αir--hαir   ……