Why is it das Grinsen?

Grinsen is the verb grinsen used as a noun, and verbs used as nouns are always neuter: das Grinsen.

More verbs used as nouns
Sense 1
das

Meaning

[1] wide smile

[1] breites Lächeln

Examples

[1] "The Unterdötz tried a new grin, the Oberdötz saw laying layers"

[1] „Der Unterdötz versuchte ein neues Grinsen, der Oberdötz sah verlegen drein.“

[1] "A slight grin moved his scarred cheek"

[1] „Ein leichtes Grinsen verzog seine vernarbten Wangen.“

Declension

1 Singular Plural
Nominativ das Grinsen —
Genitiv des Grinsens —
Dativ dem Grinsen —
Akkusativ das Grinsen —

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary