"uncertain of his convictions"
"unsure of himself and his future"
"moving with uncertain (or unsure) steps"
"an uncertain smile"
"touched the ornaments with uncertain fingers"
"an uncertain future"
"a manuscript of uncertain origin"
"plans are still uncertain"
"changes of great if uncertain consequences"
"without further evidence his story must remain uncertain"
"his doom is as yet unsealed"
"everything is uncertain about the army"
"the issue is uncertain"
"a changeable climate"
"the weather is uncertain"
"unsettled weather with rain and hail and sunshine coming one right after the other"
"an uncertain recollection of events"
"a gun with a rather uncertain trigger"
"she spoke in no uncertain terms"