you mowed my lawn so i credit you 20 dollars, or i pay you 20 dollars.

but you broke something so i charge you 10 dollars, or i debit you 10 dollars.

so after these two transactions, you have only 10 dollars. i paid you 20 then deducted 10 leaving you a balance of 10.

from my end, the same transactions is recorded this way:

i started with 100, debited 20 to you for mowing the lawn, then credited back 10 for the broken thing, leaving me with a balance of 90.

so you see that we credit from some account and debit to some other account.

Credit, the opposite of debit is adding funds to an account.