Components
けいび is an exact match with one form of the following word:
警備
BOOST
Reading : けいび   
defense; defence; guard; policing; security
My mastery:
My current mastery of 警備:
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My flashcards:
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Usefulness and usage:
Kanshudo usefulness level: 4 (among the 5,000 most useful words in Japanese)
• Kanshudo usefulness level is based on a usefulness score of 113,151 which gives a rank of 3,463
警備 is the most useful form. 1 additional form is shown below.
This word is a member of our collection of the 10,000 most useful words in Japanese:
• This form is almost always used
• Google Japan frequency rank: 21,000 (about 30,200,000 results)
• This form appears in Wikipedia's list of JLPT N2 vocabulary (see JLPT collections)
• Kanshudo JLPT value = N2
• Wikipedia most common 20000 words rank: 2437
• This form appears in the 24,000 words in the Mainichi Shimbun frequency analysis by Alexandre Girardi
• This form is in band 4 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
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Example sentences:
ごひゃく
500
にん
けいかん
警官
げんじゅう
厳重
けいび
警備
たいせい
態勢
おかれた
500 policemen were put on strict alert.
けいかい
警戒
けいび
警備

Forewarned is forearmed.
とうがい
当該
ばしょ
場所
けいび
警備
たんとう
担当
している
もの
たち
りょうかい
了解
した
おうとう
応答
している

The people in charge of guarding the relevant locations responded that they understood.
けいび
BOOST
My flashcards:
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Usefulness and usage:
• This form is rarely used
• Google Japan frequency rank: 143,000 (about 617,000 results)
• This form appears in the 24,000 words in the Mainichi Shimbun frequency analysis by Alexandre Girardi
• This form is in band 4 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
VIEW INFLECTIONS
ケイ   admonish
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ケイ   うやま to respect, revere   
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grass   
ク    verse, phrase   
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wrap
コウ   ク   くち mouth   
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ぼく strike   
ゲン   ゴン   say; word   こと word, saying   い to say   
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イチ   イツ   ひと    ひと- one   
ビ   そなえる to prepare, to provide for   そなわる to be furnished with   
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ジン   ニン   ひと man   
ヨウ   もちいる to use   
cliff
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