生気 (せいき)life; vitality; verve

生気, its kanji, and other words that share them.Open this graph

Kanji in 生気

学生がくせいstudent (esp. a university student)
生活せいかつliving; life (one's daily existence)
生産せいさんproduction; manufacture
人生じんせい(human) life (i.e. conception to death)
先生せんせいteacher; instructor
厚生省こうせいしょうMinistry of Health and Welfare (now Ministry of Health, Labour and Welfare)
年生ねんせいpupil in ... year; student in ... year
新生しんせいrebirth; new birth
人気にんきpopularity; public favor
景気けいきbusiness conditions; the market
気きspirit; mind
気持ちきもちfeeling; sensation
病気びょうきillness (usu. excluding minor ailments, e.g. colds); disease
電気でんきelectricity
一気いっきone breath
気分きぶんfeeling; mood

See how 生気 connects to the rest of Japanese.