Adjectives - work

Which adjective means “giving satisfaction because it is useful or important”?

Which adjective means “doing the same action again and again”?

Which adjective means “requiring a lot of effort, time, or energy”?

Which adjective means “very important, influential, and with a lot of responsibility”?

Which adjective means “very repetitive and boring; always the same”?

Which adjective means “very boring, tiring, and making you impatient”?

Which adjective means “testing your abilities in a way that is interesting and difficult”?

Which adjective describes a job with “no prospects of progress or promotion”?

Which adjective means “making you feel enthusiastic and eager to do something”?