[ 'spɛkjʊleɪt ]
■ verb
1》 form a theory or conjecture without firm evidence.
2》 invest in stocks, property, or other ventures in the hope of gain but with the risk of loss.
Derivatives
speculation noun
speculator noun
Origin
C16 (earlier (ME) as speculation ): from L. speculat- , speculari 'observe', from specula 'watchtower', from specere 'to look'.