Definition

1. Noun:
   • Pumice stone: A type of light, porous volcanic rock used for smoothing or polishing surfaces, or for removing hard skin.
   • Abrasive stone / Rough stone: A general term for a rough-textured stone used for grinding, sharpening, or smoothing other materials.

Usage Examples

• Noun:
  • Cô ấy dùng đá nhám để làm mịn da chân. (She uses a pumice stone to smooth her feet.)
  • Thợ mộc dùng đá nhám để mài nhẵn bề mặt gỗ. (The carpenter uses an abrasive stone to smooth the wood surface.)

Advanced Usage

• The term "đá nhám" can refer specifically to natural pumice or to any manufactured abrasive stone with a coarse, gritty surface used in crafts or industry.

Variants and Related Words

• Đá bọt: Pumice stone. Often used interchangeably with "đá nhám".
• Đá ráp: Rough stone, abrasive stone. A synonym emphasizing the coarse texture.
• Giấy nhám (n): Sandpaper. A related abrasive material made from paper or cloth.

Synonyms

• Pumice: A light, porous volcanic rock.
• Abrasive stone: A stone used for grinding or polishing.
• Grindstone: A wheel or block used for sharpening or grinding.

Notes on Usage

• "Đá nhám" is commonly understood in everyday Vietnamese to mean pumice stone for personal care.
• In technical or craft contexts (e.g., woodworking, metalworking), it broadly means any abrasive stone or rough stone used for smoothing.

1. như đá bọt
2. (địa phương) như đá ráp