Prepositions after verbs: O

oblige-to-by-with-in, for obscure by, for, from, in or to? observe in, by, on, with or for? "obsess about" or "obsess over"? "obtain from" or "obtain by"? occupy by, with, in, for or at? occur in, to, at, on or during? offend by, at, in, against or with? "offer by" or "offer to"? offset by, from, with, for or against? "omit from" or "omit by"? "open in" or "open to"? operate in, by, on, at or from? oppose to, by, in, for or on? oppress by, in, for, over or with? opt for, out, into, to or in? optimize for, in, by, within or on? orchestrate by, from, in, against or at? "ordain by", "ordain in" or "ordain for"? "order by" or "order from"? organize by, in, for, into or on? orient to, towards, toward, in or on? "originate from" or "originate in"? "oscillate between" or "oscillate at"? "oust from" or "oust by"? outline in, by, for, at or on? outnumber by, at or in? outsource to, in, by, for or as? overcome by, in, for, through or with? overflow with, from, into, out or at? "overlook by" or "overlook in"? "overreact to", "overreact in" or "overreact by"? "overrun by" or "overrun with"? oversee by, in, after, against or among? overtake by, in, on, with or at? "overthrow by" or "overthrow in"? "overturn by" or "overturn in"? "overwhelm by" or "overwhelm with"? owe to, by, on, for or in?