This is the 41st most frequent Russian word.
страны
"Countries."
In this sentence, 'страны' is the accusative plural form of 'страна' (country), used here as a direct object in the sentence.
Я люблю видать новые страны в путешествиях.
I love seeing new countries when traveling.
In this sentence, 'стран' is the genitive plural form of 'страна' (country), used to indicate possession or relation.
На карте можно увидеть расположение всех стран.
On the map, you can see the location of all countries.
In this sentence, 'страны' is the genitive singular form of 'страна' (country), indicating possession or affiliation.