Questions & Answers about Vi varmer suppe på kjøkkenet.
Varmer is the present tense of the verb å varme (“to warm/heat”). In Norwegian, the present is formed by adding -r to the infinitive stem:
• jeg varmer
• du varmer
• han/hun varmer
• vi varmer
…etc.
In this sentence suppe is used as a mass (uncountable) noun—like “soup” in English—so you omit the indefinite article. If you mean a specific, countable bowl of soup, you could say en suppe:
• Vi varmer suppe. (We heat soup in general.)
• Vi varmer en suppe. (We heat one (a specific) bowl of soup.)