인도유럽어족과 히타이트어를 포함한 아나톨리아어파를 포괄하는 가설상의 언어 가족에 관한.
Relating to the hypothetical language family that includes Indo-European and the Anatolian languages such as Hittite.
예문:
"The IH hypothesis suggests that Anatolian languages branched off earlier than other Indo-European languages."
"Scholars continue to debate the validity of the IH classification in historical linguistics."