wa·ter·tight 
(wôtər-tīt′, wŏtər-)
(wôtər-tīt′, wŏtər-)adj.
1. So tightly made that water cannot enter or escape.
2. Having no flaws or loopholes; impossible to fault, refute, or evade: a watertight alibi; a watertight contract.
- seclusively
- secobarbital
- second
- second
- Second Advent
- secondarily
- secondariness
- secondary
- secondary accent
- secondary battery
- secondary cell
- secondary color
- secondary consumer
- secondary electron
- secondary emission
- secondary growth
- secondary market
- secondary offering
- secondary school
- secondary sex characteristic
- secondary stress
- secondary structure
- secondary succession
- secondary syphilis
- secondary tissue