From Wiktionary, the free dictionary
From Proto-Slavic *lěsišče, an augmentative form of лес (les, “forest”) + -ище (-ište).
ле́сище • (lésište) n
- (augmentative) large forest
- Synonym: гори́ще (goríšte)
- (rare, dated) woodland
- “лесище”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “лесище”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010