Challenging: that tests your ability or skill as it is difficult.
"This school year is challenging for us"
Stressful: full of tension.
"Having to study for the exams is sometimes stressful"
Rewarding: worthwhile, affording satisfaction.
"The end of the school day is very rewarding as we go home”
Demanding: that requires a big effort.
“Getting up early is a demanding task”
Permanent: long lasting, lasting forever.
“Tattoos are permanent”
Boring: dull, not amusing.
“Long films can be very boring”
Helpful: useful, convenient, beneficial.
“Having experience is helpful to find a good job”
Monotonous: lacking of variety, always following the same pattern.
“Some lessons can be monotonous”
Underpaid: not well rewarded.
“Cooks at McDonald´s are underpaid”
Well-paid: getting a good amount of money.
“Football players are very well-paid”
Part-time: less than a full schedule. Not full-time.
“I only work part-time for 20 hours”
Customer-facing: meeting the public.
“Clerks have a customer-facing job”
Mind-numbing: extremely uninspiring.
“I think working in an office is mind-numbing”
Time-consuming: that wastes a lot of your time.
“Relationships are time-consuming”
Dead-end: without prospects.
“Cleaners usually think that they have a dead-end job”
Hardworking: someone who works a lot.
"He promoted because he is a hardworking person"
Honest: sincere and honorable.
"My dad is very honest with everything"
Rude: impolite, rough.
"Sometimes footballers are very rude to others"
Skilled: someone who shows ability.
"Surgeons are skilled doctors"
Accurate: precise, with no mistake.
"Soldiers need to be accurate"
Persistent: lasting for a long time.
"Lawyers must be persistent"
Shy: timid.
"Our new partner is very shy, he doesn´t talk much"
Enthusiastic: someone interested and involved.
"María is a very enthusiastic teacher"
Lazy: unwilling to work.
"I am very lazy in the morning"
Punctual: always on time.
"We are never punctual for class, we are always late"
Scruffy: untidy, wearing worn clothes.
"Painters usually wear scruffy clothes"
Qualified: having good knowledge of something.
"University students have to be qualified"
Slow: not any fast.
"We must work slow to do things well"
Trustworthy: reliable, deserving confidence.
"I leave her a copy of my keys because she is trustworthy"
Outgoing: friendly, sociable, responsive.
"My friend loves meeting new people, he is very outgoing"
Opposites:
Part-time / Full-time
Well-paid / Underpaid
Permanent / Temporary
Boring / Interesting (funny, exciting)
Demanding / Simple (Easy)
Stressful / Achievable (Peaceful, Comfortable)
Mind-numbing (Tiresome) / Engaging (Interesting, Involving)
Rewarding / Disappointing (Demoralizing)
Helpful / Useless (Ineffective)
hardworking / lazy
honest / dishonest
rude / polite
skilled / inexpert
accurate / inaccurate
enthusiastic / indifferent
punctual / late
qualified / unskilled
slow / fast
trustworthy / unreliable
Pairs:
I am interested in electricity, I think it is interesting.
He is tired of that tiring job.
This class is boring, so I´m bored.
Cinema is entertaining, I am always entertained when I watch a movie.
Find synonyms and opposites here:
https://www.merriam-webster.com/thesaurus
Jobs and adjectives:
Well-paid: Policeman, Surgeon.
Boring: Accountant, Security guard.
Stressful: Waiter, doctor.
Rewarding: electrician, lawyer.
Customer-facing: clerk, janitor.
Demanding: Architect, truck-driver.
Monotonous: Cleaner, factory worker.
Interesting: Biologist, video-games tester.