cùng nhau 
together like: miteinander → →
miteinander schlafen ☊ 
ngủ với nhau, lên giường cùng nhau ☊ 
☊ miteinander schlafen ☊ 做爱 ☊ zuòài Discuss it among yourselves (= with each other) first. ☊ among ☊
argue (with sb) (about/over sth): We're always arguing with each other about money. ☊ argue ☊
You wouldn't normally associate these two writers—their styles are completely different. ☊ associate ☊
I've never seen two people so attached to each other. ☊ attached ☊
She tries to balance home life and career. ☊ balance ☊
beat A and B together: Beat the flour and milk together. ☊ beat ☊
The two events are closely connected. ☊ closely ☊
She has successfully combined a career and bringing up a family. ☊ combine ☊
The novel is about a family who can't communicate with each other. ☊ communicate ☊
communicate with sb/sth: Dolphins use sound to communicate with each other. ☊ communicate ☊
Many of these ideas appear to be in conflict with each other. ☊ conflict ☊
I was surprised to hear them mentioned together: I had never connected them before. ☊ connect ☊
The towns are connected by train and bus services. ☊ connect ☊
They are connected by marriage. ☊ connected ☊
The two issues are closely connected. ☊ connected ☊
The two incidents are not directly linked. ☊ directly ☊
There should be closer links between education and industry. ☊ education ☊
They are engaged to be married (= to each other). ☊ engaged ☊
We get along just fine together. ☊ get on with sb, get on (together) ☊
They exchanged hellos (= said hello to each other) and forced smiles. ☊ hello ☊
They're not romantically involved. ☊ involved ☊
join (A and B) (together/up): Join the two sections of pipe together. ☊ join ☊
link A and B (together): When computers are networked, they are linked together so that information can be transferred between them. ☊ link ☊
link A and B: The two factors are directly linked. ☊ link ☊
The personal and social development of the child are inextricably linked (= they depend on each other). ☊ link ☊
The two problems are only loosely related. ☊ loosely ☊
multiply A and B (together): Multiply 2 and 6 together and you get 12. ☊ multiply ☊
They simply can't seem to live in peace with each other. ☊ peace ☊
permit sb/yourself sth: We were not permitted any contact with each other. ☊ permit ☊
plan that...: They planned that the two routes would connect. ☊ plan ☊
relate sth: I found it difficult to relate the two ideas in my mind. ☊ relate ☊
You need to screw all the parts together. ☊ screw ☊
They've been seeing a lot of each other (= spending a lot of time together) recently. ☊ see ☊
Taste and smell are closely connected. ☊ smell ☊
I saw her in the street but we didn't speak. ☊ speak ☊
Ann and Joe aren't talking to each other right now (= they refuse to speak to each other because they have argued). ☊ talk ☊
Mike and I shared some really good times. ☊ time ☊
They both spoke together. ☊ together ☊
We should present a united front (= an appearance of being in agreement with each other). ☊ united ☊