No, it is an article (indefinite article), which is a form of "determiner" that determines if a noun is a specific example or any one of the examples. "An" obstacle = any obstacle "The" obstacle = a certain obstacle
To impede.
There is no such thing as exactly vertical because either it is vertical or it is not. You cannot have approximately vertical - it is not vertical, then. Vertical means at 90 degrees to the horizon (or horizontal).
by moving vertical
vertical
obstacle of reading
In the context of video games, the "Vertical Confusion" achievement is typically unlocked by performing a specific action or reaching a certain milestone related to vertical movement within the game. This could involve successfully navigating a vertical obstacle course, completing a vertical climb, or reaching a high altitude within the game world. To unlock this achievement, players often need to demonstrate proficiency in controlling their character's vertical movement and mastering the game's vertical mechanics. It may require precision, timing, and strategic use of in-game resources to accomplish the necessary tasks for unlocking the achievement.
her largest obstacle
Obstacle is correct.
that test was as difficult as n obstacle
No, it is an article (indefinite article), which is a form of "determiner" that determines if a noun is a specific example or any one of the examples. "An" obstacle = any obstacle "The" obstacle = a certain obstacle
That obstacle is in my way!
Verrazannos biggest obstacle is
Octavian was Cleopatra's biggest obstacle.
every body had to face an obstacle in there life
The Tagalog word for "obstacle" is "hadlang".
Yes, obstacle is a noun. It refers to something that blocks or hinders progress or movement.