厚紙|あつがみatsugami[0]heiban (flat)

1. nouncardboard; thick paper
   ２．ペンで厚紙あつがみにブーメランの形かたちを描えがく。描えがいたブーメランを切り取きりとる。↗

   2. Draw a boomerang shape on the card with a pen. Cut out the boomerang you've drawn.

• Synonym板紙いたがみWrittenA written or trade term for stiff cardboard; in everyday speech people usually say 「ボール紙」.
• Synonymボール紙ボールがみNeutralThe everyday word for the stiff cardboard used in boxes and packaging; 「厚紙」 is the broader term for any thick paper.
• Antonym薄紙うすがみNeutralThin paper, the opposite of thick 「厚紙」; also seen in the phrase 「薄紙を剥ぐよう」.

Use 「厚紙」 for thick paper in general. For the stiff cardboard of boxes and packaging, 「ボール紙」 is the everyday choice and 「板紙」 the written/trade term. 「薄紙」 is its opposite, thin paper.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 厚あつさが厚あついかみ。あつがみ。