na-adjective, noun
Describes something or someone as peculiar, odd, or out of the ordinary in a colloquial, often lighthearted way. Used as a na-adjective or noun.
彼の服装はいつもへんてこだ。
His clothes are always weird.
へんてこな夢を見た。
I had a strange dream.
noun
strange thing; strange person
Refers to a strange object or person. Often used in phrases like へんてこなもの or へんてこなやつ.
あの店にはへんてこなものがたくさん売っている。
That shop sells a lot of strange things.
彼は本当にへんてこなやつだ。
He's a really weird guy.
Ateji kanji form; rarely used.
The origin is uncertain. It may be a reduplicative or emphatic formation from 変 (へん, 'strange') with the suffix てこ, but the exact derivation is unclear.