escort, send
送 centers on moving something or someone from one place to another: sending a person off, escorting them, or transmitting an object.
broadcasting; broadcast; program; announcement
to send; to dispatch; to forward; to transmit; to ship; to remit
postage; carriage; shipping charge
seeing off; sending off
transmission; sending
transport; transportation; transit; conveyance
sending; forwarding; shipping
transfer (of a call, patient, etc.); forwarding (a letter, email, etc.); redirection
mailing; posting
delivery
transportation; conveyance; delivery
transport; freight; shipping; moving (goods)
remittance; sending money; transferring money
seeing (someone) off; send-off
transfer; transport; transportation
pushing (propelling) (one's opponent) out of the ring from behind
seeing off and meeting on return
transmission of electricity; electricity supply; power supply
sending; forwarding; remitting
committing a suspect to trial; referring a case to a public prosecutor
putting off (doing); postponement; delaying
sending home; repatriation; deportation
to send in
transmission; communication; circulation; dissemination; diffusion; propagation; delivery
送 combines 辶 (movement) with a component that historically represented a hand offering something, together suggesting sending or escorting.
The movement radical 辶 wraps around 关, which looks like a person with arms extended. Picture someone walking alongside another, arms out to guide them: escorting and sending them on their way.
For ソウ, imagine sending a soul off with a gentle escort: soul -> ソウ, and the movement radical shows the soul being guided away.