Ignited, set fire to (3)
I believe the answer is:
lit
I believe this is a double definition.
'ignited' is the first definition.
(synonyms)
'set fire to' is the second definition.
(as in lighting a fire)
(Other definitions for lit that I've seen before include "Settled" , "books etc?" , "was illuminating" , "fine writing in condensed form" , "landed here" .)