There is a second -s in the third syllable.
When you see kn- the k- is silent.
Words ending with -mb the last -b is silent.
wuh-mah-n and wuh-meh-n.
The -s is silent.
The -w is silent.
As in please close the door.
The -e is silent.
There are only two syllables.
Stress on the -s not on the -k.