-stu

Etymology
Cognate with 🇨🇬.

Suffix

 * linn "city" → linnastu "metropolitan area"
 * kalm "burial mound" → kalmistu "graveyard"
 * puu "tree" → puistu "a part of a forest with the same features"
 * puu "tree" → puistu "a part of a forest with the same features"