Expressing "gentle" with 温和 and 温柔
温和 and 温柔 have the same meaning, but differ slightly in usage.
The adjective 温和
温和 
is used to express a friendly attitude towards someone or something.
is used to express a friendly attitude towards someone or something.Examples
他温和地微笑了一下
He smiled good-naturedly
tā wēnhé de wēixiào le yíxià
他是个温和有礼的男人
He is a gentle and polite man
tā shì ge wēnhé yǒulǐ de nánrén
温和 is also used when referring to the weather.
Examples
这里的冬天气温温和
The winters are mild here
zhèlǐ de dōngtiān qìwēn wēnhé
28日以前天气一直温和
The weather was mild until the 28th
èrshí bā rì yǐqián tiānqì yìzhí wēnhé
The adjective 温柔
温柔 is used to emphasize someone’s gentle nature. It is most commonly used when referring to women.
is used to emphasize someone’s gentle nature. It is most commonly used when referring to women.Examples
这个女孩子很温柔
This girl is very gentle
zhè ge nǚ háizi hěn wēnróu
她望着他，眼神很温柔
She looks at him fondly
tā wàngzhe tā, yǎnshén hěn wēnróu