レーダーreedaa
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- nounradar
- Synonym電波探知機でんぱたんちきWrittenWritten/formal prose name for radar, a kanji rendering of the loanword; used less often. 「レーダー」 is the everyday word and also appears in figurative uses like 「恋愛レーダー」.
- Synonym電探でんたんNeutralShort for 「電波探知機」; an old WWII military term, now rare. Today 「レーダー」 is the usual word.
Use 「レーダー」 in almost all contexts, including figurative ones like 「恋愛レーダー」. 「電波探知機」 is its written/formal kanji name, seen mostly in prose; 「電探」 is an old WWII military abbreviation you will rarely need.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


