make clear; give a reason for:
cloud,
tangle,
confuse,
misrepresent,
complicate,
mystify,
hide,
conceal,
be vague,
perplex,
stagnate,
withhold,
obscure,
distort,
wonder,
misunderstand,
question.
noun:
confound,
obfuscate,
befog,
confuse,
obscure,
cloud.