unlined
[ˌʌnˈlaɪnd]
adj.
（指纸等）无线条的;
（指脸等）无皱纹的;
（指衣服等）无衬里的;
例句:
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He is a slight man with sandy-colored hair and a boyishly unlined face.
来自NEWYORKER
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His jacket was unlined.
他的夹克没有衬.
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His cheeks were unlined.
他的脸颊无皱.
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Special liners are also available for inserting into unlined channels.
专用的衬套也可用来嵌入无镶衬的渠道里.
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Howell went on to make an unlined linen jacket, and then trousers using a robust corduroy.
来自WSJ
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His red-brown neck suggests a modest sunbed habit, his unlined forehead screams chemical assistance.
来自THETIMES