Diaphanous

Function:adjective

Etymology: Medieval Latin diaphanus, from Greek diaphan's, from diaphainein to show through, from dia- + phainein to show - more at fancy

Date: 1614

1 : characterized by such fineness of texture as to permit seeing through - diaphanous fabrics
2 : characterized by extreme delicacy of form : ethereal - painted diaphanous landscapes
3 : insubstantial , vague - had only a diaphanous hope of success