心配の種だ
心配の種(になる)
心配の種が絶えない
I shall never come to the end of my anxieties.
to reveal the trick―show one's hand
I hold the cards in my hands.
to be anxious about something
someone who sows
the condition of fearing something unreasonably
心配すること
to worry about something
それだけが心配の種だ.