The quality or state of being subject to a duty or tax; the extent to which something can be taxed.
From dutiable (capable of being taxed) + -ity (noun suffix). Dutiable comes from duty (a tax owed) + -able (capable of). The root 'duty' comes from Old French 'dueté' meaning 'what is owed.'
This word exists mostly in legal and tax documents, but it reveals how medieval ideas about 'what is owed' to a ruler became our modern tax system—your ability to be taxed is quite literally your 'dutiability'!
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