( opaque ( ( Describes ( ( the property ) ( of ( ( a material ) ( that ( ( does not ) ( ( allow ( visible light ) ) ( to ( pass through ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN opaque)) (VP (VBZ Describes) (NP (NP (DT the) (NN property)) (PP (IN of) (NP (NP (DT a) (NN material)) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB not) (VP (VB allow) (NP (JJ visible) (NN light)) (S (VP (TO to) (VP (VB pass) (PRT (RP through))))))))))))) (. .)))
opaque Describes the property of a material that does not allow visible light to pass through.
(ROOT (S (NP (NNP Opaque)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NN matter))) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB not) (VP (VB let) (NP (DT any) (JJ light) (NN pass)) (PRT (RP through)))))))) (. .)))