v. [UNDER-1 10 a, 4 b.]

1

  † 1.  trans. To think too little of, to underestimate.

2

a. 1623.  Buck, Rich. III. (1616), 52. Charles … was so … overweening of his owne … judgement, that he under-thought all mens else.

3

  2.  intr. To think insufficiently.

4

1711.  Shaftesb., Charac., III. 301. They might rather thank themselves, for having under-thought, or reason’d short, so as to rest satisfy’d with a very superficial Search.

5

  3.  trans. To penetrate under by thinking.

6

1886.  A. Weir, Hist. Basis Mod. Europe (1889), 491. Man … can to some degree return upon his thought, can to some extent underthink the conditions of cognition.

7