1. posit- + -ive.
2. etymologically means 'placed down, laid down', hence 'emphatically asserted'.
3. from Latin, meaning 'settled by agreement'.
4. => dealing only with facts, absolute, expressed without qualification, confident in opinion, concentrating on what is constructive and good.
5. placed down, laid down: 着实、敲定、确定下来，或者主观、武断地确定下来，或者主观地认为确定下来了。
6. 即：由字面、词源含义(placed down, laid down)引申表示为：主观心理的、客观实际的放下来了、确定下来的、定下来了。
7. positive + -ness.

1. Although his words are harsh, there is positiveness in them.

虽然他的话很苛刻, 但有建设性.

来自《简明英汉词典》

2. Positiveness : The visIt'should be helpful, not destructive.

6积极性: 课堂观察应该提供帮助, 而非破坏教师的积极性.

来自互联网

3. Positiveness. Being upbeat usually elicits a positive response. Encouragement and sincere compliments are always appreciated.

乐观: 乐观的表现通常会得到积极的回应. 鼓励,真诚和称赞是很必要的.

来自互联网

4. In addition, positiveness of consumer prior experctations directly affects perceived persuasiveness of evidence.

再者,先前期望之正向性也直接影响证据被知觉之说服力.

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5. Positiveness of acid - fast stains of urinary sediment and specificity of B - ultrasonography were low.

尿沉渣找抗酸杆菌阳性率较低,B超检查对泌尿系结核感染诊断的特异性较低.

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