continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. moving in one side and out of other side of.

word group forming conceptual unit. Sets of words used together. To choose words to say what you mean clearly.

likely or prone to be affected by. conditionally upon. An area of study at school, e.g. math, history. To cause to suffer or experience something.

Being in attendance; being there; having turned up. period of time now occurring. To give a speech or presentation.

officially compulsory, or otherwise considered essential. To need something, to make it necessary.

To do something without stopping, or after pausing.

university academic of highest rank.

subject to conditions being met. Clause or sentence beginning with 'if' or 'unless'.

Of words that show the action is done to yourself. reflexive word.

comply with rules or laws.

(of verb or sense or use of verb) not taking direct object. intransitive verb.

providing additional help. auxiliary person or thing.

move or travel behind.

Nonfinite form of the verb, e.g. -ing or -ed forms.