Strong’s Hebrew Lexicon:
Ask: 1245 baqash baw-kash’ a primitive root; to search out (by any method, specifically in worship or prayer); by implication, to strive after:–ask, beg, beseech, desire, enquire, get, make inquisition, procure, (make) request, require, seek (for).
Seek: 1239 baqar baw-kar a primitive root; properly, to plough, or (generally) break forth, i.e. (figuratively) to inspect, admire, care for,consider:–(make) inquire (-ry), (make) search, seek out.
Knock: 1849 daphaq daw-fak’ a primitive root; to knock; by analogy, to press severely:–beat, knock, overdrive.