not very large, strong or important 不大的；不堅固的；不重要的 an insubstantial construction of wood and glue 用木頭和膠黏合的簡單構造 an insubstantial argument 不充實的論據 an insubstantial meal 不豐盛的一頓飯
- (literary)
not real or solid 非真實的；非實體的；虛幻的 as insubstantial as a shadow 虛無缥缈
Word Originearly 17th cent.: from late Latin insubstantialis, from in- ‘not’ + substantialis (from substantia ‘being, essence’, from substant- ‘standing firm’, from the verb substare).