あだおろそか

Meanings

making light of; disregarding; treating as unimportant

usually written using kana alone

Used adverbially, typically as あだおろそかに followed by a negative verb, to express that something should not be taken lightly or neglected. The word is a combination of 徒 (あだ, vain/futile) and 疎か (おろそか, neglectful).

Kanji

徒on foot, junior, emptiness
疎alienate, rough, neglect

Related words

おろそか
おろそか means 'neglectful' or 'careless' and is more common. あだおろそか is a stronger, rarer compound that adds the nuance of 'vain' or 'futile' disregard.
軽かろんじる
軽んじる means 'to look down on' or 'to make light of' and is a verb. あだおろそか is an adjectival noun used adverbially with a negative verb.

Built from

徒あだ+おろそか

Written forms

あだおろそかUsage100%
Usually written in kana; the kanji form 徒疎か is rare and may not be widely recognized.
徒疎あだおろそか
Rare kanji spelling; learners are better off using the kana form.

Etymology

Compound of 徒 (あだ, 'vain, futile') and 疎か (おろそか, 'neglectful'). The exact historical derivation is uncertain, but the combination intensifies the sense of careless disregard.