gentle, mild
Possible opposites are timid, calm, shy, withdrawn, meek, or mild.
Tame is where you have a animal that is perfectly OK around people
tame
wild
untamed, violent
tame
fierce
The opposite of a dangerous dog would be a harmless, friendly, or tame dog.
calmcooldullgentlegoodhappykindmildmoderatenicepleasantquiettameweak
Something can be tame, or nonfrightening. The opposite of something scary would be something reassuring.
The opposite of a dangerous dog would be a harmless, friendly, or tame dog.
Wild, untamed.