step·fa·ther 
(stĕpfä′thər)
(stĕpfä′thər)n.
A man who is a stepparent.
- semi-auto
- semiautobiographical
- semiautomated
- semiautomatic
- semi-automatic
- semiautonomous
- semiautonomously
- semiautonomy
- semibold
- semibreve
- semicentennial
- semicircle
- semicircular
- semicircular canal
- semicivilized
- semiclassical
- semicolon
- semicoma
- semicomatose
- semiconducting
- semiconductor
- semiconductor diode
- semiconductor laser
- semiconscious
- semiconsciously