drone, ineffectual bumbler, passenger-carrying drone, flying car

The Economist

Technological advances means that flying cars—or passenger-carrying drones—are now a reality. They could transform the way we travel in the future

https://econ.st/2OyjiNe

朝日新聞（The Asahi Shimbun）

熊本地震から半年になるのを前に、大きな被害を受けた熊本城の現状を、市から許可を得て、小型無人飛行機（ドローン）を使って撮影しました。

落ちた瓦、茂る草…　被災半年、熊本城をドローンで撮影：朝日新聞デジタル

熊本地震から半年になるのを前に、朝日新聞社は６日、大きな被害を受けた熊本城の現状を小型無人飛行機（ドローン）を使って撮影した。熊本市か…

ASAHI.COM

ineffectual 

Pronunciation: /ɪnɪˈfɛktʃʊəl/ 

ADJECTIVE

1Not producing any significant or desired effect:an ineffectual campaign

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1.1(Of a person) lacking the ability or qualities to fulfil a role or handle a situation:she was neglectful and ineffectual as a parent

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bumble 

Pronunciation: /ˈbʌmb(ə)l/ 

VERB

1[NO OBJECT, WITH ADVERBIAL OF DIRECTION] Move or act in an awkward or confused manner:they bumbled around the house

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2[NO OBJECT] Speak in a confused or indistinct way:the succeeding speakers bumbled

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2.1[WITH ADVERBIAL] (Of an insect) buzz or hum:she watched a bee bumble among the flowers

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Derivatives

bumbler

Pronunciation: /ˈbʌmblə/ 

NOUN

Example sentences

Origin

Late Middle English (in the sense 'hum, drone'): from boom¹ + -le⁴.