a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
give or bring back; "Restore the stolen painting to its rightful owner"
bring back into original existence, use, function, or position; "restore law and order"; "reestablish peace in the region"; "restore the emperor to the throne"
return to its original or usable and functioning condition; "restore the forest to its original pristine condition"
freedom from difficulty or hardship or effort; "he rose through the ranks with apparent ease"; "they put it into containers for ease of transportation"; "the very easiness of the deed held her back"
freedom from constraint or embarrassment; "I am never at ease with strangers"
a freedom from financial difficulty that promotes a comfortable state; "a life of luxury and ease"; "he had all the material comforts of this world"
move gently or carefully; "He eased himself into the chair"