疑
ギ, うたが.う
doubt, distrust, be suspicious, question
JLPT3 G6 S14 F283
As per 矣# (come to a stop) + an obsolete element of unclear composition and signification. *Question* may be regarded as originating in the idea of "stop and interrogate a person," leading to the associated meanings *suspicion* and *doubt*.
[Full Kanji Etymology List]