凹おう凸とつ

お

う

と

つ

Common wordFreq.FrequencyTop 50,000

Meanings

1

noun

unevenness; bumpiness; roughness

Physical unevenness of a surface, with both raised and sunken parts. Common in patterns such as 凹凸がある, 凹凸が多い, and 表面の凹凸.

この道みちは凹おう凸とつが多おおくて歩あるき

にくい

。

This road is very uneven and hard to walk on.

表ひょう面めんの凹おう凸とつをなくしてから塗と装そうする。

Paint it after removing the unevenness from the surface.

2

noun

imbalance; unevenness; disparity

Figurative use for uneven distribution, imbalance, or disparity in degree, quality, treatment, ability, and similar matters. Often a little more written or analytical than everyday ばらつき.

自じ治ち体たいによって支し援えんの手て厚あつさに凹おう凸とつがある。
The level of support varies unevenly from one municipality to another.
各かく部ぶ署しょの負ふ担たんに凹おう凸とつが出でている。
An imbalance has appeared in the workloads of the different departments.

Usage patterns

〈物もの〉の表ひょう面めんに凹おう凸とつがあるthe surface of something is uneven/bumpy
このボードの表ひょう面めんには細こまかい凹おう凸とつがある。
The surface of this board has fine bumps and dips.
〈事こと〉に凹おう凸とつがあるthere is unevenness/imbalance in something (e.g. treatment, quality)
評ひょう価かの仕し方かたに凹おう凸とつがあると不ふ満まんが出でる。
If there's inconsistency in how things are evaluated, people complain.
凹おう凸とつが多おおいto be very uneven/bumpy
この道みちは凹おう凸とつが多おおくて歩あるきにくい。
This road is very bumpy and hard to walk on.
凹おう凸とつをなくすto smooth out unevenness
紙かみやすりで表ひょう面めんの凹おう凸とつをなくした。
I sanded down the surface to get rid of the unevenness.

Kanji

凹concave, hollow, sunken
凸convex, beetle brow, uneven

Related words

凸でこ凹ぼこN2sense 1
凸凹 is the everyday, casual word for bumpiness and can also be used figuratively, while 凹凸 sounds more formal and technical.
格かく差さN1sense 2
格差 specifically means a gap or disparity, especially social or economic, while 凹凸 covers a broader sense of unevenness or imbalance.
起き伏ふくN1sense 1
起伏 emphasizes rises and falls, often of terrain, emotion, or a story, whereas 凹凸 focuses on surface irregularities or uneven distribution.

Opposites

平へい坦たん sense 1
平坦 describes a flat, even surface, the direct opposite of the bumpy unevenness described by 凹凸.
均きん等とうN1sense 2
均等 means evenly balanced or equal, contrasting with the imbalance or disparity meant by 凹凸 in its figurative sense.

Don't confuse with

高こう低ていN1
凹凸 refers to bumpy, uneven surface texture (dents and bumps), while 高低 refers to overall variation in height or level, often over a larger scale.

Written forms

凹おう凸とつUsage98%
Standard kanji spelling; the two characters visually match the idea of depressions and protrusions.
おうとつUsage2%

Etymology

A Sino-Japanese compound of 凹, associated with being concave or sunken, and 凸, associated with being convex or protruding. This component explanation matches the modern written form; no further historical derivation is asserted here.