The sound | of

OF
abbr. chem. scient.	Oxygen Free
abbr. el. scient.	Optical Fiber
abbr. IT	Output File; Overflow Flag
abbr. mil.	Objective Force; Opposing Force; Optional Form
abbr. progr. IT	Open File
abbr. sport.	Outfield; Outfielder

| underwater

underwater
water.suppl. abbr.	u.w.

| bubbles

bubble
abbr. oil	b

| or

OR
abbr. med.	Orbicularis Oris

of water bubbling