What Does It Mean?

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From our dictionary:
dis•sem•ble

(di-sem'bul),
v., --bled, -bling.
v.t.
1. to give a false or misleading appearance to; conceal the truth or real nature of: to dissemble one's incompetence in business.
2. to put on the appearance of; feign: to dissemble innocence.
3. Obs. to let pass unnoticed; ignore.

v.i.
to conceal one's true motives, thoughts, etc., by some pretense; speak or act hypocritically.