词源

源自中古英語 、、，源自古法語 (“莽撞的”)，源自古法語 (“愚蠢的，疯癫的”)（←拉丁語 (“风箱；袋子；充气球；肚子”)，最终源自原始印歐語 (“涨”)） + 古法語 (“耐用的，强韧的，坚韧的”)（ (“使...坚硬”)的过去式，源自不可考的古法蘭克語 ，源自原始日耳曼語 (“硬的，勇敢的”)），等价于 +‎ 。对比、等词。

发音

• (標準英音) 國際音標^(幫助)：/ˈfuːlhɑːdi/
• (通用美式) 國際音標^(幫助)：/ˈfulˌhɑɹdi/

• （通用美式）音频：

  (檔案)

• （澳洲）音频：

  (檔案)

• 斷字：fool‧har‧dy

形容词

(比較級，最高級)

1. 蛮勇的，鲁莽的，冲动而不计后果的
   • Template:RQ:Twain Tom Sawyer
   • 2000, , 章號 1, 出自 , 1st US版, New York, N.Y.: , →ISBN，頁號 14:

     In the middle distance several foolhardy souls in wet suits were surfing toward some foamy outbursts on the rocky headland; nearer in, a scattering of paddlers was being continually and, it seemed, happily engulfed by explosive waves.

     （請為本引文添加中文翻譯）

   • 2017 3月 26, “The Observer view on triggering article 50: As Britain hurtles towards the precipice, truth and democracy are in short supply”, 出自 ‎, London，於30 August 2017歸檔自原頁面:

     It is a reckless, foolhardy leap into the unknown and the prelude, perhaps, to what the existentialist writer described in  – a fall from grace, in every conceivable sense.

     （請為本引文添加中文翻譯）

名词

(複數)

1. 鲁莽冲动的人
   • 1977, Rolf R. Mueller, Festival and Fiction in Heinrich Wittenwiler's Ring，頁號 26:

     Resentful of the saddle-fast stranger, eight foolhardies return for more adventure.

     （請為本引文添加中文翻譯）

   • 2019, Colson Whitehead, The Nickel Boys:

     Some foolhardies in the schoolhouse laughed at him then and Griff stuck their heads into toilets, one by one over the next week.

     （請為本引文添加中文翻譯）

形容词

1. 的另一種寫法