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Why JLPT N1 learners mix up 付き (つき, “attached to; impression; sociality; appearance; furnished with; under; to”) and 亜科 (あか, “suborder; subfamily”).
付き (attached to; furnished with) and 亜科 (biological subfamily) are both terms that describe something as coming with or belonging to something larger; 付き suggests inclusion just as 亜科 signals subcategory membership.
On JLPT N1, this pair shows up as a vocabulary meaning question. You see one word and pick its English equivalent from four options — one of which will be the other word in this pair, chosen as a distractor precisely because of the overlap.
Reading the explanation is step one. Targeted practice is what actually moves a confusion pair out of your weak list. Free, no signup needed to try.
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