Explanation:

- Meticulous: This word means being very careful and precise about details.

- Option 1: Careless – This is the opposite of meticulous, as it means lacking attention or consideration, and not being concerned about accuracy or detail.

- Option 2: Thankful – This means feeling or showing gratitude. It does not relate to being meticulous.

- Option 3: Lavish – This means rich, elaborate, or luxurious. It doesn't contrast with meticulous but rather refers to something style-related.

- Option 4: Finicky – This means fussy about details, similar to meticulous, not its opposite.