This is the 8733rd most frequent Korean word.
간병인이
A caregiver or caretaker.
Here, '간병인이' is the subject of the sentence, denoting the caregiver who is performing the action of attending.
간병인이 환자를 돌봐주고 있습니다.
The caregiver is attending to the patient.
In this sentence, '간병인' is used with the possessive marker '의' (의 in '병원의') to specify caregivers belonging to the hospital.
병원의 간병인은 매우 친절합니다.
The caregivers at the hospital are very kind.
Here, '간병인이' refers to the identity or role the speaker aspires to, connected with the verb.