Select the most appropriate synonym of the given word.

Vertical

Upright

The most appropriate synonym of the given word Vertical is Upright.

• Vertical means at right angles to the horizon.
• Upright means standing or leaning straight up.

The two words are similar in that they both suggest the idea of being in a straight up-and-down position. However, the word vertical has a more specific meaning, as it refers to a line or direction that is at right angles to the horizon. The word upright has a more general meaning, and can be used to refer to anything that is in a straight up-and-down position.

In the sentence "The tree stood upright," the speaker is not just saying that the tree was standing up, but that the tree was also standing straight up and down. Therefore, the word "upright" is the most appropriate synonym for the word "vertical" in this context.

The other words on the list are not as appropriate synonyms for vertical. The word equal means having the same measure, quantity, or value. The word parallel means running side by side and never meeting. The word shaky means unsteady or trembling. These words do not convey the same sense of being in a straight up-and-down position as the word vertical.