The initial idioms of the letter S

sink into despair	sink like a stone
sink one’s teeth into something	sink or swim
sink teeth into	sink through the floor
sink to	sink to such depths
sink under	sink without trace
sinker	sinking fast
sinking feeling	sinking feeling, a
sinking ship	sinse
sip at	siphon off
siphon the python	siphon
sip	sipster
sir	siree
sis	sissified
sister	sit around
sit at	at someone's feet, be