From the given options, select the one which is similar in meaning to the given word

"Lament"

Mourn

The word that is most similar in meaning to "lament" is mourn.

• Lament means to express grief or sorrow for something, often in a loud or mournful way.
• Mourn means to feel or express deep sorrow or sadness, especially for someone who has died.

The other options have different meanings.

• Complain means to express dissatisfaction or annoyance about something.
• Console means to comfort or give support to someone who is sad or upset.
• Celebrate means to mark an event or occasion with happiness, festivities, or demonstrations of appreciation.

So, the answer is Option 2: Mourn.