1flare 
/ˈfleɚ/ verb
flares; flared; flar·ing /ˈfleɚ/ verb 1 [no obj] : to shine or burn suddenly and briefly
▪ A match flared (up) in the darkness. 2 [no obj] : to become suddenly excited, angry, or active
▪ Tempers flared [=people became angry] during the debate. — often + up ▪ The fighting flared up again after a two-week lull. ▪ She flared up [=became very angry] at her brother. ▪ Her asthma has flared up again. [=her asthma has become suddenly active or worse again] 3 : to open or spread outward [no obj] ▪ pants that flare at the bottom ▪ the bull's flaring nostrils — often + out ▪ The skirt flares out at the knee. [+ obj] ▪ The bull flared its nostrils.
▪ A match flared (up) in the darkness.
▪ Tempers flared [=people became angry] during the debate. — often + up ▪ The fighting flared up again after a two-week lull. ▪ She flared up [=became very angry] at her brother. ▪ Her asthma has flared up again. [=her asthma has become suddenly active or worse again]
