insubstantial - a. 내용 없는; 약한, 무른; 상상의, 가공의

• material
• real
• substantial

• Mirage is insubstantial.
• It must have been annoying for Alice Pike to have to break a note to pay for a relatively insubstantial amount.
• They were too insubstantial to have served as a stave or a splint.