<entry id="2237035" stat="A" corpus="jmdict" type="jmdict">
<ent_corp type="jmdict">jmdict</ent_corp>
<ent_seq>1168780</ent_seq>
<k_ele>
<keb>姻戚</keb>
</k_ele>
<r_ele>
<reb>いんせき</reb>
</r_ele>
<sense>
<pos>&n;</pos>
<gloss>in-law</gloss>
<gloss>relative by marriage</gloss>
</sense>
<info>
<audit time="2023-05-07 18:39:00" stat="A" unap="true">
<upd_name>Brian Krznarich</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>see comments on 姻族.

Not sure to handle the field of "anthropology"), but "affinity" seems like a relatively technical term to me, which wikipedia notes as pertaining to anthropology and law, and alc notes as 人類学.  I don't think this is the first time I've looked for an [anth]ropology tag. 

Based on reverso (which I grant is hardly definitive here), the "affinity" gloss would be better attached to 姻族 instead (or in addition).

reverso gives "in-laws" and "relatives" for this term, similar ngrams.
姻族	17226	53.7%
姻戚	14842	46.3%

At very least, a translator not fluent in English should be shied away from the "affinity" gloss if they don't know what they are doing. (I am learning so many new English words...)</upd_detl>
<upd_refs>https://en.wikipedia.org/wiki/Affinity_(law)
In law and in cultural anthropology, affinity is the kinship relationship created or that exists between two people as a result of someone's marriage. 

https://eow.alc.co.jp/search?q=%E5%A7%BB%E6%88%9A
in-law
relative
姻戚関係 affinity（人類学の）〔血のつながりではなく婚姻によって作られる関係。◆【対】consanguinity〕

alc only attached "affinity" to the whole term "姻戚関係", though it also tags as 人類学.  The note on "【対】consanguinity" is what motivated the [ant] relationship between 血族 and 姻族.</upd_refs>
<upd_diff>@@ -12,0 +13 @@
+&lt;gloss&gt;in-law&lt;/gloss&gt;
@@ -13,0 +15,6 @@
+&lt;/sense&gt;
+&lt;sense&gt;
+&lt;pos&gt;&amp;n;&lt;/pos&gt;
+&lt;pos&gt;&amp;adj-no;&lt;/pos&gt;
+&lt;field&gt;&amp;law;&lt;/field&gt;
+&lt;s_inf&gt;esp. in anthropology and law&lt;/s_inf&gt;</upd_diff>
</audit>
<audit time="2023-05-08 02:40:33" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>I think 姻族 is a better place for "affinity".</upd_detl>
<upd_refs>JEs</upd_refs>
<upd_diff>@@ -16,7 +15,0 @@
-&lt;sense&gt;
-&lt;pos&gt;&amp;n;&lt;/pos&gt;
-&lt;pos&gt;&amp;adj-no;&lt;/pos&gt;
-&lt;field&gt;&amp;law;&lt;/field&gt;
-&lt;s_inf&gt;esp. in anthropology and law&lt;/s_inf&gt;
-&lt;gloss&gt;affinity&lt;/gloss&gt;
-&lt;/sense&gt;</upd_diff>
</audit>
<audit time="2023-05-09 23:27:59" stat="A">
<upd_uid>robin1354</upd_uid>
<upd_name>Robin Scott</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_refs>姻戚	14,842			
姻戚の	844</upd_refs>
<upd_diff>@@ -12 +11,0 @@
-&lt;pos&gt;&amp;adj-no;&lt;/pos&gt;</upd_diff>
</audit>
</info>
</entry>