This is the 71st most frequent Chinese word.
同
"Same" or "together."
Here, '同' indicates 'as' or 'together,' relating two subjects to express similarity.
他的意见同我的一致。
His opinion is the same as mine.
In this context, '同' (as seen in '同心') implies 'together,' emphasizing unity or shared purpose.
同心协力完成任务。
Work together with unity to complete the task.
In this sentence, '同' is part of '同事' (colleague), where '同' conveys the meaning of 'same' (a person with the same workplace).