Rare term for a pestle, especially a wooden one used with a mortar (すり鉢). More commonly called すりこ木.
See also: すりこぎ
My grandmother likes to grind sesame seeds with a pestle in a mortar.
Standard kanji spelling with regular okurigana.
Variant with abbreviated okurigana; less common but still encountered.
Irregular okurigana usage; the reading あたりぎ is not obvious from this spelling.
Compound of 当たり (atari, 'hitting') + 木 (ki, 'wood'), literally 'hitting wood'. The exact derivation is uncertain, but it likely refers to the action of pounding or grinding with a wooden tool.