Only 9 letter word in the English Language in which after every step you remove a letter, you would be still left with a meaningful word:
STARTLING
Remove L – it becomes STARTING
Remove T – it becomes STARING
Remove A – it becomes STRING
Remove R – it becomes STING
Remove T – it becomes SING
Remove G – it becomes SIN
Remove S – it becomes IN
Remove N – it becomes I
Letters ‘a’, ‘b’, ‘c’ & ‘d’ do not appear anywhere in the spellings of 1 to 99
(Letter ‘d’ comes for the first time in Hundred)
Letters ‘a’, ‘b’ & ‘c’ do not appear anywhere in the spellings of 1 to 999
(Letter ‘a’ comes for the first time in Thousand)
Letters ‘b’ & ‘c’ do not appear anywhere in the spellings of 1 to 999,999,999
(Letter ‘b’ comes for the first time in Billion)
And
Letter ‘c’ does not appear anywhere in in the spellings of entire English Counting.