warning, guard against, to exhort, to admonish
Left: two hands 廾 (= twice this hand 屮 with the fingers 山 towards the top; simplified & combined), right: halberd 戈
Two hands are holding up a halberd to warn and admonish.
machine, appliance, tool, gear, mechanical
Left: tree 木, right: admonish/warning 戒 (two hands 廾 holding a halberd 戈 to admonish)
If you use wood and your hands to make a halberd, you need: a machine.
commandment, to admonish, prohibit
Left: word 讠/言, right: to warn 戒 (Two hands 廾 are holding a halberd 戈 to warn) [hands 廾 = twice this hand 屮 with the fingers 山 towards the top; simplified & combined]
Words to warn as a commandment.
To the Trainer