ふたつながら

ふ

た

つ

な

が

ら

Meanings

1

adverb

usually written using kana alone

Adverb meaning 'both' (of two things). Often used in formal or literary contexts, but the kana form is common.

彼かれは学がく問もんと武ぶ道どう、ふたつながらに秀ひいでている。
He excels in both scholarship and martial arts.

その

案あん

は

、

経けい

済ざい

と

環かん

境きょう

、

ふた

つ

ながら

に

配はい

慮りょ

し

て

いる

。

The plan takes both the economy and the environment into consideration.

両りょう方ほう
両方 is the common everyday word for 'both', while ふたつながら is more formal and emphasizes that both qualities or aspects are present simultaneously.
どちらも
どちらも is a casual way to say 'both', whereas ふたつながら is more literary and often used in set phrases.

Compound of 二つ (futatsu, 'two') + ながら (nagara, 'while, both'). The nagara here functions as a particle meaning 'both' or 'as well as'.