The big seal script of character Everyone Agrees is
The top triangle is mouth downward, under which are two people with mouth on top. The meaning of the character is that two or more people are discussing something, eventually they get consensus. The top mouth expresses the final consensus, which is not just everyone, but something everyone agrees.
The small seal script of character Everyone Agrees is
Similar to the big seal script.
The clerical script of character Everyone Agrees is
The two people in the bottom are changed a little bit, overall it is similar to older scripts.
The traditional song typeface of the character is
Similar to clerical script.
The simplified song typeface of the character is
The top is same as older scripts, but the bottom changed completely. How is it changed? I don't know, probably from its cursive script.
The pinyin of character 僉/佥 is Qian1.
The character has not been used as a single character in the text long time ago, but used as a part in many compound characters. The meanings except Consensus, are more, but overall is to make things smaller, neater, clearer, more order physically or mentally.