tr.v. frustrated, frustrating, frustrates
1. To prevent from accomplishing a purpose or fulfilling a desire; thwart:
2. To cause feelings of discouragement or bafflement in.
3. To ineffectual or invalid; nullify.
EXAMPLE SENTENCES:
1. A persistent wind frustrated my attempt to rake the lawn.
2. many frustrated poets end as pipe-smoking teachers"; "his best efforts were thwarted"