The expressions in these verses are all wishes that the day of Job's birth would no longer exist. This may imply that the day, although in the past, still existed somehow. The UDB translates them as expressions of sadness about what that day was like.
These two clauses describe the darkness of the day of Job's birth, thus repeating Job's regret that he had been born. (See: [[rc://en/ta/man/translate/figs-parallelism]])
Here darkness and the shadow of death are spoken of as if they were people who could claim something as their own possession. The word "it" refers to the day of Job's birth. (See: [[rc://en/ta/man/translate/figs-personification]])
Here a cloud is spoken of as if it were a person who could live over the day of Job's birth. AT: "May a cloud cover it so no one can see it" (See: [[rc://en/ta/man/translate/figs-metaphor]])
# everything that makes the day black
This refers to things that block out the sun's light and create darkness. Here "black" represents darkness. (See: [[rc://en/ta/man/translate/figs-metaphor]])
"terrify that day." The day is spoken of as if it were a person who could be terrified by the darkness. (See: [[rc://en/ta/man/translate/figs-personification]])