The Dutch word for plug is
stop

Dutch Definition

stop	©
1. n-m. An action of stopping, cessation.
2. n-m. A plug for a sink, a stopper.
3. n-m. An electric fuse.
4. v. first-person singular present indicative of stoppen
5. v. imperative of stoppen

prop
1. n-f. A swab, plug made of paper, cloth, slime or some other suitable material.
2. n-f. A piece of paper or similar which has been crumpled into a ball-like shape, usually though not necessarily with the intent of throwing it away. → A wad of paper. Usually used in the diminutive form pr
3. n-f. An embolism. Often used in the diminutive form propje. The substance of the embolism can be indicated: bloedpropje (blood clot), vetpropje (fatty substance), cholesterolpropje (ch
4. v. first-person singular present indicative of proppen
5. v. imperative of proppen