subtle; delicate; difficult; complex; doubtful; questionable
pure; true; genuine; unmixed
charming; fascinating; attractive
not necessarily so; is not always true
to deal with (a person); to treat; to deal with (a problem); to handle; to operate (e.g. a machine); to handle; to deal in
difficult to ...; hard to ...
tough; hard; determined; strong-minded; strong (e.g. sunlight, alcohol); severe
isn't it?; let's ...; why don't we ...; how about we ...
to accompany; to follow; to keep up with
to ask; to inquire; to blame (someone) for; to accuse of; to care about; to regard as important
basis; foundation; grounds; authority
can do nothing but (do); cannot help (doing) something