fuzzy

of, resembling, or covered with fuzz

indistinct; unclear or distorted

not clearly thought out or expressed

(of the hair) tightly curled or very wavy

maths of or relating to a form of set theory in which set membership depends on a likelihood function

(of a computer program or system) designed to operate according to the principles of fuzzy logic, so as to be able to deal with data which is imprecise or has uncertain boundaries