[header] How to say no to a child and mean it [title] Say " no " in a clear, firm tone. [step] Start by saying " no " in a tone that is clear, firm, and in control. Raise your voice so the child can hear you but do not yell or scream when you say " no. 
" yelling and screaming can teach the child that shouting and raising your voice is okay, especially when you say " no. " rather, you should appear calm, collected, and assertive to the child when you say " no.