intimidating
adjective
ɪnˈtɪmɪdeɪtɪŋ 
ɪnˈtɪmɪdeɪtɪŋ frightening in a way which makes a person feel less confident
an intimidating mannerintimidating for/to somebody This kind of questioning can be very intimidating to children.
Definition of intimidating adjective from the Oxford Advanced Learner's Dictionary
ɪnˈtɪmɪdeɪtɪŋ ɪnˈtɪmɪdeɪtɪŋ 