額|ひたいhitai[0]heiban (flat)

1. nounforehead; brow
   額ひたいの汗あせをふきなさい。↗

   Wipe the sweat from your brow.

• SynonymおでこCasualColloquial and affectionate, used mainly with children or close acquaintances; can also mean a protruding forehead. In formal settings say 「額」.
• Synonym前額ぜんがくWrittenWritten/formal prose, mostly in anatomical or medical descriptions; rarely used alone in daily life. For the forehead say 「額」 or 「おでこ」.
• Synonym前額部ぜんがくぶWrittenMedical term for the forehead as a body region, as in 「前額部の外傷」; not used in everyday speech.

For the forehead, 「額」 is the default. Use 「おでこ」 in casual, affectionate talk with children or close friends (it can also mean a bulging forehead). 「前額」 and 「前額部」 are written/medical terms for anatomical descriptions.

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

1. （ひたい）顔かおのうち、髪かみの生はえぎわからまゆまでの部分ぶぶん。おでこ。