opaline¹/ʹohpəlien/ adj

opaline²noun

• think big
• thinking
• think much of
• think nothing of
• think nothing of it
• think on one's feet
• think out
• think out of/outside the box
• think over
• think tank
• think the world of
• think through
• think twice
• think up
• thin-layer chromatography
• thinner
• thin-skinned
• thio-
• thiol
• thiopental
• thiopentone
• thiosulphate
• thiourea
• third
• third age