拉丁词根dextra表示右手，sinista表示左手
法语adroit表示右手，gauche表示左手

dexter
Of or located on the right side.
Heraldry. Situated on or being the side of a shield on the wearer's right and the observer's left.
Obsolete. Auspicious; favorable.
adj.
1. 右侧的, 右手的
2. 预兆吉利的, 幸运的
3. (盾徽)右边的

dexterity
Skill and grace in physical movement, especially in the use of the hands; adroitness.
Mental skill or adroitness; cleverness.
n.
1. (手)灵巧, 熟练, 灵敏
2. (头脑)敏捷; 聪慧, 机敏
3. 惯用右手

例句：
Does he have enough dexterity to cope with a job like that?
他是否灵活到能应付那样的工作?

dextral
Of, relating to, or located on the right side; right.
Right-handed.
Zoology. Of or relating to a gastropod shell that coils clockwise and has its aperture to the right when facing the observer with the apex upward.
adj.
1. 在右(边)的, 向右(边)的
2. 用右手 的, 右手的
3. (软体动物的螺形外壳等)右旋的, 右卷的

dexterous
Skillful in the use of the hands.
Having mental skill or adroitness.
Done with dexterity.
adj.
1. 灵巧的, 巧妙的, 手巧的
2. 敏捷的
3. 惯用右手的

意思都含“身、手灵巧的”、“机敏的”
1. dexterous 指 “(身、手)灵巧的”、“敏捷的”、“熟练的”, 如:
a dexterous mechanic
一位灵敏熟练的技工。
2. adroit 指“ 不但熟巧还机智”, 如:
an adroit tennis player
一位熟练的网球运动员。
3. deft 指“(手)灵敏的”、“熟练的”, 特指“机敏的”, 如:
a deft surgeon
一位机敏的外科医生。
4. handy 指 “手巧的”多用于一些小事上, 如:
She was handy with her needle.
她善长针线活。

sinister sin
Suggesting or threatening evil: a sinister smile.
Presaging trouble; ominous: sinister storm clouds.
Attended by or causing disaster or inauspicious circumstances.
On the left side; left.
Heraldry. Situated on or being the side of a shield on the wearer's left and the observer's right.
adj.
1. 不祥的; 有害的; 阴险的; 邪恶的
2.【纹章学】(盾章)左边的
3.[古语]左的，左边的

sinistral
Of or facing the left side.
Left-handed.
Zoology. Relating to or being a gastropod shell that has its aperture to the left when facing the observer with the apex upward.
adj.
1. 向左的, 左方的
2. 有左旋纹的(贝壳等)
3. 用左手的
n. 左撇子

adroit roit-rit-right
Dexterous; deft.
Skillful and adept under pressing conditions. See Synonyms at dexterous.
adj.熟练的, 灵巧的, 机灵的

gauche
Lacking social polish; tactless
doing or saying wrong or impolite things, especially because you do not know the right way to behave
adj.[法]
1. 不善交际; 笨拙的; 粗鲁的
2. 左方[边]的
3. 【数】非对称的, 歪的, 扭的, 不可展的

例句：
He now seems gauche and uninteresting.
他显得又笨拙又古板。