惧
ク, おそ.れる
fear, be afraid of, dread
JLPT0 G7 S11 F2097
懼
is as per
瞿
# (look nervously about) +
心
heart/emotions → nervous emotion in the forms of *fear*, *awe* or *apprehensiveness*.
惧
is a variant form of
懼
.
[Full Kanji Etymology List]