Beck, brook (4)
I believe the answer is:
burn
I believe this is a double definition.
'beck' is the first definition.
(thesaurus)
'brook' is the second definition.
(I've seen this before)
(Other definitions for burn that I've seen before include "Incinerate" , "Set on fire" , "pain during exercise" , "Catch fire; small stream" , "Char" .)