The word "checkpoint" applies to a location, and cannot have an antonym. The concept of border control could be illustrated by the antonymic adjectives "guarded" and "unregulated".
No, patting is not possible on Checkpoint. Checkpoint does not have a patting feature.
checkpoint
Checkpoint 1 is at -45 meters, while checkpoint 2 is at -191 meters. To find out how much higher checkpoint 1 is than checkpoint 2, subtract -191 from -45: -45 - (-191) = 146. Therefore, checkpoint 1 is 146 meters higher than checkpoint 2.
he reached the checkpoint
Checkpoint is a noun.
Checkpoint Charlie
there is no checkpoint
Checkpoint Charlie
G1/S checkpoint
Woodlands Train Checkpoint was created in 1998.
Checkpoint Charlie Museum was created in 1962.
Futian Checkpoint Station was created in 2007.