老人をいたわりなさい。

the aged; old person

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to pity; to sympathize with; to sympathise with; to treat with sympathy; to console; to be kind to; to appreciate; to tend to (e.g. an injury); to care for; to nurse; to soothe

to do