幻を追う[maboroshiwoou] to pursue an illusion
幻影[genei] phantom
幻覚[genkaku] hallucination
幻覚剤[genkakuzai] hallucinogen
幻姿[genshi] apparition

幻視[genshi] visual hallucination
幻想[gensou] illusions
幻想劇[gensougeki] non-realistic drama
幻像[genzou] phantom

哀惜[aiseki] grief
愛惜[aiseki] missing someone
一文惜み[ichimonoshimi] stinginess
骨惜しみ[honeoshimi] sparing oneself
出し惜しみ[dashioshimi] unwilling

出し惜しむ[dashioshimu] to grudge
惜しい[oshii] regrettable
惜しまない[oshimanai] without sparing (effort, funds, etc.)
惜しむ[oshimu] to be frugal
惜敗[sekihai] regrettable defeat