Answer: on

AnswerCrossword Clue
oned as a function word to indicate a time frame during which something takes place a parade on Sunday or an instant, action, or occurrence when something begins or is done on cue on arriving home, I found your letter news on the hour cash on delivery
oned as a function word to indicate the cause or source profited on the sale of stock
oned as a function word to indicate a source of attachment or support on a string stand on one foot hang it on a nail
onto go on
oned as a function word to indicate the object of collision, opposition, or hostile action bumped my head on a limb an attack on religion pulled a gun on me
oned as a function word to indicate reason, ground, or basis (as for an action, opinion, or computation) I have it on good authority on one condition the interest will be 10 cents on the dollar
ontoward
oned as a function word to indicate the focus of obligation or responsibility drinks are on the house put the blame on me
onaware of the true nature, motive, or meaning of
onOntario, Canada (approved for postal use)
oned as a function word to indicate means of conveyance on the bus
onused as a function word to indicate position in contact with and supported by the top surface of the book is lying on the table
oned as a function word to indicate involvement or participation on tour on the team on duty
oned as a function word to indicate the subject of study, discussion, or consideration a book on insects reflect on that a moment agree on price
oned as a function word to indicate active involvement in a condition or status on the increase on the lookout
oned as a function word to indicate a medium of expression on stage best show on television
oned as a function word to indicate destination or the focus of some action, movement, or directed effort crept up on him feast your eyes on this working on my skiing made a payment on the loan
oned as a function word to indicate inclusion put it on the agenda
oned as a function word to indicate the location of something on the left on the south side of the house on the farm
onconcerning
oned as a function word to indicate the object with respect to some misfortune or disadvantageous event the crops died on them
oned as a function word to indicate position in close proximity with a village on the sea stay on your opponent
oned as a function word to indicate position in or in contact with an outer surface the fly landed on the ceiling I have a cut on my finger paint on the wall
onnear to
onin use
oned as a function word to indicate position or status in proper relationship with a standard or objective on schedule
oned as a function word to indicate reduplication or succession in a series loss on loss
oned as a function word to indicate a source of dependence you can rely on me feeds on insects lives on a pension
onat great length
onat the time of
oninto or in operation
onforward
onin contact with
onin, into, or onto a thing, place, or person
onOld Norse
oned as a function word to indicate the object with respect to some disadvantage, handicap, or detriment has three inches in height on me a 3-game lead on the second-place team the joke's on me
oned as a function word to indicate presence in the possession of had a knife on him
onintermittently
oned as a function word to indicate manner of doing something often used with the on the sly keep everything on the up-and-up
oned as a function word to indicate the focus of feelings, determination, or will have pity on me keen on sports a curse on you