We looked for it high and low.
Wareware wa achikochi sore o sagashita.
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
here and there; all around; everywhere; throughout; all over; to get things in the wrong order (back to front); to become muddled up
that (indicating an item or person near the listener, the action of the listener, or something on their mind); it; that time; then; there (indicating a place near the listener); you
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
to search (for something desired, needed); to look for; to search (for something lost); to seek (a suspect in a crime)