This is the 9336th most frequent Japanese word.
真っ直ぐ
Straight; directly; upright.
In this sentence, '真っ直ぐ' is used as an adverb to indicate moving straightforwardly in a straight direction.
道を真っ直ぐに歩いてください。
Please walk straight ahead on the road.
Here, '真っ直ぐ' is used as an adjective describing someone's personality as upright and forthright.
彼は真っ直ぐな性格です。
He has an upfront and straightforward personality.
In this instance, '真っ直ぐ' is an adjective to describe the nature of living straightforwardly and honestly.