וַיֹּ֕אמֶר אֶת־קֹלְךָ֥ שָׁמַ֖עְתִּי בַּגָּ֑ן וָאִירָ֛א כִּֽי־עֵירֹ֥ם אָנֹ֖כִי וָאֵחָבֵֽא׃
האָט ער געענטפֿערט: איך האָב געהערט דײַן קול אין גאָרטן, און איך האָב מורא געהאַט, װײַל איך בין נאַקעט, האָב איך מיך באַהאַלטן.
Radak
ויאמר..כי עירום אנכי, the word עירום is again spelled with the letter י serving to elongate the syllable commencing with the letter ע.
Sforno
ואירא, this feeling of fear is similar to that experienced by the Jewish people in Exodus 34,30 when, because of the sin of the golden calf, the people were afraid to face him after his face radiated light when he returned from Mount Sinai.
Chizkuni
כי עירום אנכי, because I am nude;” although they wore the fig leaf. Perhaps that leaf only covered their private parts.