speculate

Từ điển American Heritage Dictionary 4th

spec·u·late (spĕkʹyə-lāt')v. spec·u·lat·ed, spec·u·lat·ing, spec·u·latesv. intr.
1. To meditate on a subject; reflect.
2. To engage in a course of reasoning often based on inconclusive evidence. See Synonyms at think.
3. To engage in the buying or selling of a commodity with an element of risk on the chance of profit.v. tr.
To assume to be true without conclusive evidence:
speculated that high cholesterol was a contributing factor to the patient's health problems. [Latin speculārī, speculāt-, to observe, from specula, watchtower, from specere, to look at. See spek- in Indo-European Roots.]

• Từ đồng nghĩa / Synonyms:
  job, theorize, theorise, conjecture, hypothesize, hypothesise, hypothecate, suppose