Vocabulary consisting only from characters you are able to read
内聞
naibun
secret, private (information)mix
やる気
jaruki
willingness (e.g. to do something)/eagerness/motivation/inspiration/determination/high aspirationsjlpt3
効用
koujou
use, utility, effect, benefitmix
中年
čuunen
middle-age, middle age, midlife, one's middle yearsmix