苦悩[kunou] suffering
子煩悩[kobonnou] indulgent
思い悩む[omoinayamu] to worry
伸び悩む[nobinayamu] to be sluggish (business)
頭を悩ます[atamawonayamasu] to rack one's brains

悩ましい[nayamashii] seductive
悩ます[nayamasu] to afflict
悩み[nayami] trouble
悩みごと[nayamigoto] something causing worry
悩む[nayamu] to be worried

亜種[ashu] subspecies
異機種[ikishu] heterogenous equipment
異種[ishu] different kind (species, variety)
育種[ikushu] (plant) breeding
育種家[ikushuka] (plant) breeder

育種所[ikushujo] (plant) nursery
一種[isshu] species
一粒種[hitotsubudane] an only child
種違い[tanechigai] half-brother
艶種[tsuyadane] love affair