De or het speed?

The correct Dutch article is:

de speed

Meaning (Dutch) 1. (informeel, scheikunde) drug met een stimulerende werking meestal amfetamine 2. snelheid

How to use speed

the speedde speed
this speeddeze speed
that speeddie speed
our speedonze speed
your speedjouw speed
every speedelke speed
which speed?welke speed?
a big speed / the big speedeen grote speed, de grote speed

Dutch words ending in speed

hespeed | nederspeed

In compound words, the last part decides the article. See the rule

Dutch words starting with speed

speedbike | speedboot | speeddate | speedpedelec | speedway | speedgarage | speedmetal

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).