• That through which light can pass - Transparent
• That through which light cannot pass - Opaque
• That through which light can partly pass - Translucent
• A sentence whose meaning is unclear - Ambiguous
• A place where orphans live - Orphanage
• That which cannot be described - Indescribable
• That which cannot be imitated - Inimitable
• That which cannot be avoided - Inevitable
• A position for which no salary is paid - Honorary
• That which cannot be defended - Indefensible
• That which is not likely to happen - Improbable
• People living at the same time - Contemporaries