"sub-excavation" meaning in English

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      "expansion": "Etymology tree\nProto-Indo-European *upó\nProto-Italic *supo\nLatin sub\nLatin sub-der.\nEnglish sub-\nEnglish excavation\nEnglish sub-excavation\n[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*upó\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*supo\", \"status\" : \"ok\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"sub\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Latin\", \"term\" : \"sub-\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"English\", \"term\" : \"sub-\", \"status\" : \"ok\", \"lang\" : \"en\" }, { \"children\" : [ ], \"lang_name\" : \"English\", \"term\" : \"excavation\", \"status\" : \"missing\", \"lang\" : \"en\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"English\", \"term\" : \"sub-excavation\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"sub-excavation\">\nFrom sub- + excavation.",
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  "etymology_text": "Etymology tree\nProto-Indo-European *upó\nProto-Italic *supo\nLatin sub\nLatin sub-der.\nEnglish sub-\nEnglish excavation\nEnglish sub-excavation\nFrom sub- + excavation.",
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