艰

difficult / hard / hardship

(once) again / also / both... and... / and yet / (used for emphasis) anyway

blunt / tough / chewy

one of the Eight Trigrams 八卦[ba1 gua4], symbolizing mountain / ☶ / ancient Chinese compass point: 45° (northeast)

difficult / hard / challenging

difficult / hard / arduous

hardships / arduous / difficult

arduous / terrible (task) / very difficult / formidable

difficult and dangerous / hardships and perils

to make progress only with great difficulty (idiom)

untold dangers and difficulties (idiom)

to struggle arduously

to have difficulty walking (idiom) / to walk with difficulty

abstruse and unfathomable (idiom)

(literary) to be in mourning after the death of a parent

shrink or flinch from no difficulty or danger / make light of difficulties and dangers

life is hard enough as it is; don't burst my bubble (Internet slang)

arduousness / formidability / difficulty

abstruse / complicated

leading a plain, hardworking life (idiom)