"difficult" - key terms from Wikipedia

been difficult
difficult
difficult	dive
difficult	for new
difficult	loves
difficult	or impossible
difficult	problems
difficult	second book
difficult	terrain
difficult	to cure
difficult	to discern
difficult	to drive
difficult	to explain
difficult	to gather
difficult	to observe because
difficult	to prove
difficult	to start
healing is difficult
hence it is difficult
make it difficult
making it difficult
may be difficult
more difficult
more difficult	to stretch
most difficult
most difficult	problems
refinancing became more difficult
very difficult