고 밀다

push; back someone; push ahead

밀다 is pushing, and these lines spread across its senses. Physically it is pulling and pushing, or checking the door is shut before you push it. Applied to people it is backing someone up, which is why the lines about encouraging and supporting use 밀어주다. Applied to plans and goods it is pushing something through or pushing stock somewhere, and one line uses it for flattening a site to relocate a racetrack.