The arbalest (also arblast), a variation of the crossbow, came into use in Europe around the 12th century. The arbalest was a large weapon with a steel prod, or bow assembly. Since the arbalest was much larger than earlier crossbows, and because of the greater tensile strength of steel, it had a greater force. The greater draw weight was offset by a shorter draw length, which limited the total potential energy that could be transferred into the crossbow bolt. A skilled arbalestier (arbalester) could loose two bolts per minute.
French language uses the word arbalète, which is linguistically one step further from the stem, due to the disappearance of the s phoneme in the last syllable. This form of the word applies to both crossbows and arbalests (the latter may be referred to as a heavy crossbow, but an actual heavy crossbow may not be the same as an arbalest).
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