<entry id="2102769" stat="A" corpus="jmdict" type="jmdict">
<ent_corp type="jmdict">jmdict</ent_corp>
<ent_seq>1840850</ent_seq>
<k_ele>
<keb>牢固</keb>
</k_ele>
<k_ele>
<keb>牢乎</keb>
</k_ele>
<r_ele>
<reb>ろうこ</reb>
</r_ele>
<sense>
<pos>&adj-t;</pos>
<pos>&adv-to;</pos>
<gloss>firm</gloss>
<gloss>solid</gloss>
<gloss>inflexible</gloss>
<gloss>immovable</gloss>
</sense>
<info>
<audit time="2021-05-17 04:38:09" stat="A" unap="true">
<upd_name>dine</upd_name>
<upd_detl>should adv-to always accompany adj-t?</upd_detl>
<upd_refs>牢固	2163
牢乎	166

according to ngram,
牢乎 is only adj-t (apparently due to the 乎 suffix)
牢固 is usually adj-t but occasionally adj-na</upd_refs>
<upd_diff>@@ -5 +5 @@
-&lt;keb&gt;牢乎&lt;/keb&gt;
+&lt;keb&gt;牢固&lt;/keb&gt;
@@ -8 +8 @@
-&lt;keb&gt;牢固&lt;/keb&gt;
+&lt;keb&gt;牢乎&lt;/keb&gt;
@@ -13,0 +14 @@
+&lt;pos&gt;&amp;adj-t;&lt;/pos&gt;
@@ -15 +15,0 @@
-&lt;pos&gt;&amp;adj-t;&lt;/pos&gt;</upd_diff>
</audit>
<audit time="2021-05-17 22:42:28" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>Re: should adv-to always accompany adj-t?    The kokugos seem to have them together almost always.</upd_detl>
<upd_refs>牢固	2163
牢固な	262
牢固たる	463
牢固と	421
GG5, etc. 牢固たる firm; strong; solid; inflexible; immovable; steadfast</upd_refs>
<upd_diff>@@ -15 +15 @@
-&lt;pos&gt;&amp;adj-na;&lt;/pos&gt;
+&lt;pos&gt;&amp;adv-to;&lt;/pos&gt;
@@ -17,0 +18,2 @@
+&lt;gloss&gt;inflexible&lt;/gloss&gt;
+&lt;gloss&gt;immovable&lt;/gloss&gt;</upd_diff>
</audit>
</info>
</entry>