crippled in his feet

This phrase means "unable to walk."

five years old

This was the age of Jonathan's son at the time of his father's death.

This refers to the news about their death.

This is a woman or girl who is hired to care for young children.

This explains how Mephibosheth was injured so he was unable to walk.

This is the name of Jonathan's young son, the grandson of Saul.