After -m following a long vowel, diphthong or another consonant, add -pje.
Every Dutch diminutive is a het-word and forms its plural with -s (geheimpjes).
The diminutive (verkleinwoord) of geheim is "het geheimpje". After -m following a long vowel, diphthong or another consonant, add -pje.
Het. Every Dutch diminutive is a het-word, so it is het geheimpje even though geheim takes het.
Diminutives always add -s, so the plural is geheimpjes.
The platform drills the grammar that makes your Dutch natural, in real A2 exam tasks, AI-graded across all five DUO sections.