Learn Dutch: Kijk eens in de koelkast! - Just take a look in the fridge!

Eens literally means "once," but here it acts as a modal particle to soften the command. Without it, Kijk in de koelkast! sounds like a strict order. Adding eens turns it into a friendly suggestion, similar to saying "Just take a look in the fridge!" in English.

Will Dutch speakers pronounce eens exactly as it is spelled?

Usually not. In everyday spoken Dutch, when eens is used as a softening particle, it is almost always shortened and pronounced as "es" or "is". You will frequently hear natives say "Kijk is in de koelkast!" instead of pronouncing the full word.

Could I use the particle even instead of eens here?

Yes, you could absolutely say Kijk even in de koelkast!. Both particles soften the command, but they add slightly different flavors. Even implies a short duration ("Take a quick look"), while eens acts more like an open suggestion ("Why don't you take a look").

Why is the verb just Kijk without a subject pronoun like jij?

This sentence is an imperative, which is the form used for giving commands or direct suggestions. To form the imperative in Dutch, you simply use the stem of the verb (kijk) and drop the subject pronoun completely.