Components
ひらめく is an exact match with one form of the following word:
ひらめく
BOOST
'ku' godan verb, intransitive verb
1. to flash (lightning, etc.); to flicker (lights); to glitter  (often written with kana only)
2. to wave; to undulate  (often written with kana only)
3. to hit on a good idea; to occur to someone  (often written with kana only)
My mastery:
My current mastery of ひらめく:
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My flashcards:
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Usefulness and usage:
Kanshudo usefulness level: 7 (among the 20,000 most useful words in Japanese)
• Kanshudo usefulness level is based on a usefulness score of 62,264 which gives a rank of 15,542
ひらめく is the most useful form. 1 additional form is shown below.
• This form is almost always used
• Google Japan frequency rank: 59,000 (about 6,780,000 results)
• This form appears in the 1998 'Ichimango goi bunruishuu' frequent word list by Senmon Kyouiku
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Example sentences:
わたし
とお
いなづま
稲妻
ひらめき

I saw flashes of lightning in the distance.
すば
素晴
らしい
かんが
ひらめいた
A wonderful idea just ran through my mind.
かのじょ
彼女
おどろ
かせよ
という
かんが
とつぜん
突然
わたし
あたま
ひらめいた
The idea of surprising her suddenly crossed my mind.
閃く
BOOST
Reading : ひらめく   
My flashcards:
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Usefulness and usage:
• This form is rarely used
• Google Japan frequency rank: 199,000 (about 266,000 results)
• This form appears in the 1998 'Ichimango goi bunruishuu' frequent word list by Senmon Kyouiku
VIEW INFLECTIONS
セン   flash of lightning   ひらめ to flash (lightning); to hit on a good idea   
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ジン   ニン   ひと person   
モン   かど gate   
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