underburn
nounEtymology From Middle English underbrennen (“to set on fire, burn up”), equivalent to under- + burn.
1
The deliberate burning of surface fuel so as to leave the tree canopy intact.
underburn
verbEtymology From Middle English underbrennen (“to set on fire, burn up”), equivalent to under- + burn.
1
Obsolete To burn up.
2
To burn too little.