This is the 7759th most frequent Japanese word.
可
Permissible; acceptable; can.
Here, "可" is used as an adjective meaning 'acceptable' or 'allowed' in a formal context.
この計画は可とします。
This plan is approved.
In this sentence, "可" is combined with "不可" to indicate mediocrity or neutrality in evaluation. It emphasizes balanced judgment.
彼女の提案は可もなく不可もない。
Her proposal is neither excellent nor bad.
Here, "可" is used as a grade or assessment indicating 'passable' or 'satisfactory' performance.