writing brush, writing, painting brush, handwriting
筆 centers on the tool and act of writing or painting with a brush: a writing brush, handwriting, or the resulting written work.
筆 combines 竹 (bamboo) and 聿 (a hand holding a brush), reflecting the traditional bamboo-handled writing brush.
Bamboo 竹 on top and a hand holding a brush 聿 below: picture a bamboo-handled brush writing characters.
For ヒツ, imagine a brush hitting the paper with a soft 'hits' sound: hits -> ヒツ, as the brush leaves a mark.
writing brush; paintbrush; pen
writing; authoring
brush tip
(wooden) pencil
fertile shoot of field horsetail
writer; author
(taking) notes; copying
special mention
one's own handwriting; autograph
improvement (to a piece of writing or painting); revision; correction; touching up
fountain pen
handwriting
colored pencil; coloured pencil
writing on someone's behalf
one's own handwriting; autograph; holograph
one stroke (of a brush)
essays; miscellaneous writings; literary jottings
communicating in writing
(writing, painting) brush
literary art; literary activity; writing