writing ability; writing skill
Refers to the skill of composing clear, effective, or persuasive written text, often in an academic, professional, or creative context.
To improve your writing ability, it's important to read a lot and write a lot.
He has good writing skills, so he's entrusted with writing reports.
Compound of 文章 (writing, composition) and 力 (power, ability). The exact historical derivation is uncertain, but the word is a straightforward modern formation.