Most nouns simply add -je.
Every Dutch diminutive is a het-word and forms its plural with -s (effectjes).
The diminutive (verkleinwoord) of effect is "het effectje". Most nouns simply add -je.
Het. Every Dutch diminutive is a het-word, so it is het effectje even though effect takes het.
Diminutives always add -s, so the plural is effectjes.
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