Word meaning you are describing something as if to a child [closed]

Solution 1:

Patronise

1. to adopt an air of condescension toward : treat haughtily or coolly

(Merriam-Webster)

to behave or treat in a condescending way

(Dictionary.com)

The adjective form of this would be patronising.

A professor who patronises his students would be someone who acts as if their students are very young.

Solution 2:

Condescending

con·de·scend·ing (kŏn′dĭ-sĕn′dĭng)
adjective

1. showing or implying a usually patronizing descent from dignity or superiority:
   They resented the older neighbors' condescending cordiality.

(Dictionary.com)

This comes from the verb to condescend:

verb (used without object)

1. to behave as if one is conscious of descending from a superior position, rank, or dignity.

(Dictionary.com)