mountaineering
🇺🇸
/ˌmaʊntnˈɪrɪŋ/
🇬🇧
/ˌmaʊntəˈnɪərɪŋ/
The activity of climbing mountains, often as a sport.
Sarah loves mountaineering and goes on a new adventure every year.
サラは登山が好きで、毎年新しい冒険に出かけます。