蓋 means 'lid'

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Strokes : 13    Frequency: 1766   JLPT: N1    Usefulness: 5    Study set: 5-31    Grade: 8   Intermediate lesson: -    Beginner lesson: -   Begins 14 words   Used in 95 words   Used in 49 names   Component in 2 kanji (0 Jōyō)
Jōyō (常用)
   ふた lid
On    カイ   コウ
Kun    けだ   おお   かさ   かこう
the lower two components exist as a rare kanji
A Joy o' Kanji essay is available for 蓋 - click the badge to download
Learn which body parts have lids! See why "to open a lid" figuratively means "to see how things turn out." Learn to say, "I’m looking for a trash can with a lid," "Please lower the lid gently," and "reinforced glass lid." Back on the figurative side, find out how to say, "Tanaka's remarks started an argument," "You don't beat around the bush!" and "There is a suitable spouse for everyone."
The essay is also included in the following Thematic Bundles
Holding Space: Containers and Lids
缶 鉢 瓶 蓋
As all four kanji represent containers or lids, the essays abound in canning and bottling goods, whether jam or tuna, beer or shochu. Food preparation takes center stage, from grinding spices and kneading dough to cooking mushrooms in a teapot. Things heat up with hibachis, kettles, steam boilers, and the "cauldron of hell"! More unexpectedly, Buddhism keeps popping up, what with ritual vessels and mendicant priests who carry begging bowls. Body parts serve as metaphorical lids and pots. And with more figurative leaps we touch on opening the lid of one's mind and bottling youth.
⿳   () grass   leave   dish  
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In the most useful 10,000 words in Japanese, 蓋 is used 3 times, read 2 ways (with 1 variation).
Across all words in Japanese, 蓋 is used 83 times, read 4 ways (with 1 variation).
ガイ : 53 words FIND ALL
skull; cranium
(click the word to view an additional 1 reading and 1 form, examples and links)
ふた : 10 words FIND ALL
Most common form: フタ
cover; lid; cap  (often written with kana only)
(click the word to view an additional 1 reading and 2 forms, examples and links)
ふた (read as ぶた) : 16 words FIND ALL
apron of a gun; cover for the touch-hole on a cannon or matchlock  (see also: 火蓋を切る)
(click the word to view an additional 1 form, examples and links)
おお : 3 words FIND ALL
expression, 'u' godan verb
to cover up the sky (e.g. smoke)
(click the word to view an additional 1 form, examples and links)
けだ : 1 word FIND ALL
perhaps; probably  (often written with kana only)
(click the word for examples and links)
An additional one less common word includes 蓋 but the reading has not yet been categorized.
Henshall: Joy o' Kanji : 1978  Key to Kanji:

Cascading kanji view

ガイ   ふた lid   
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キョ   コ   さ leave   
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ム   private
ド   ト   ground; earth   つち ground, earth, soil   
さら dish   
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