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2 adds in denotation of first 2 letters
source | link

The answer is

Heroine

Explanation follows

HerHe - denotes men
Her - denotes women
Hero - denotes men
Heroine - denotes women

The answer is

Heroine

Explanation follows

Her - denotes women
Hero - denotes men
Heroine - denotes women

The answer is

Heroine

Explanation follows

He - denotes men
Her - denotes women
Hero - denotes men
Heroine - denotes women

1
source | link

The answer is

Heroine

Explanation follows

Her - denotes women
Hero - denotes men
Heroine - denotes women