ailing

somewhat ill or prone to illness; "my poor ailing grandmother"; "feeling a bit indisposed today"; "you look a little peaked"; "feeling poorly"; "a sickly child"; "is unwell and cant come to work"

जेल में वह काफी अस्वस्थ रहे थे और एक तरह से एकांत कारावास ही झेल रहे थे.

Sharad is ailing for the past three months.