WordNet sense 1 (deduce (a principle) or construe (a meaning)):

educe, elicit, evoke, extract, extract

WordNet sense 2 (remove as if by suction):

aspirate, aspirate, suck out

WordNet sense 3 (remove, usually with some force or effort; also used in an abstract sense):

pull, take out, pull out, pull up

WordNet sense 4 (lengthen in time; cause to be or last longer):

extend, prolong, protract