This is the 644th most frequent Icelandic word.
stuðla
"Stuðla" means "to support" or "to contribute" in English.
"stuðla" is used here in the sense of contributing to or promoting something desirable, which is in this case, a cleaner school yard.
Nemendurnir ákváðu að stuðla að hreinni skólalóð.
The students decided to promote a cleaner school yard.
"stuðla" refers here to the poetic technique of alliteration, linking the word to its literary and linguistic function.
Bókstafirnir stuðla í ljóðlínu eykur gildi skáldskapar.
The alliteration in the verse line enhances the value of the poetry.
"stuðla" is used in a negated context to indicate something that does not contribute positively to a relationship or situation.